Birkenstock x Tekla
Hopper Stripes Poplin Pyjama Short
Hopper Stripes Poplin Pyjama Short from Birkenstock x Tekla is a men's sleepwear and loungewear bottom made from 100% organic cotton poplin. It features a covered elastic waistband with a front tie ribbon, slant pockets, and patch pockets, and is available in sizes small through extra-large. These pyjama shorts are intended for sleeping and lounging at home, and are machine washable.
- Material
- 100% organic cotton poplin
- Gender
- unisex
- Style
- loungewear, casual
- Category
- Apparel & Accessories > Clothing > Sleepwear & Loungewear > Pajamas
Color
Size
Specifications
Striped organic cotton poplin pajama shorts with elastic waist and pockets.
Elastic waistband with front tie ribbon, slant pockets, patch pockets.
- Material
- 100% organic cotton poplin
- Style
- loungewear, casual
- Occasion
- loungewear
- Gender
- unisex
- Age Group
- adult
- Condition
- new
- Category
- Apparel & Accessories > Clothing > Sleepwear & Loungewear > Pajamas
Additional Attributes
- Birkenstock x Tekla collaboration
- 100% organic cotton poplin
- covered elastic waistband
- front tie ribbon
- slant pockets
- patch pockets
- striped pattern
Product Insights
The Birkenstock x Tekla Hopper Stripes Poplin Pyjama Short, an exclusive Simons collaboration and Birkenstock's first apparel venture, redefines loungewear as daywear with a no-rub elastic waistband, practical pockets, and a high-rise, wide-leg silhouette in GOTS-certified organic cotton poplin made in Portugal. Priced at 195 CAD—significantly less than Tekla’s mainline—it offers true-to-size fit for waists 25–35 inches, a sand color that pairs with earth tones and lightens with washing, and durability that develops a patina, though shrinkage requires cold washing and low drying. Balancing between sleep and street wear, these shorts deliver a structured, oversized drape that prevents a sloppy look while emphasizing ethical production and a Tokyo-inspired city-to-home narrative.
- Collaboration
First Birkenstock apparel and Tekla footwear, exclusive to Simons with Tokyo campaign.
Why this is supported
This collaboration marks a historic first:
it’s the first time Birkenstock has ventured into the realm of apparel, while Tekla celebrates its debut footwear moment.
vogue.comThe capsule is identified as
Birkenstock x Tekla at Le 31
stylight.ca, and the accompanying campaign
follows a group of people as they move between a bustling metropolis and a tranquil home with gardens in a dream-like state, captured by Ben Beagent in Tokyo, Japan.
tag-walk.com, reinforcing the unique story behind the product.
- Daywear design
Designed for out-of-bedroom wear with no-rub waistband and practical pockets.
Why this is supported
Vogue states the shorts are
suitable to wear out and about as they are on the sofa
vogue.com. The
Covered elastic waistband with a tie ribbon at the front
stylight.caprevents direct skin contact with the elastic, reducing chafing. The inclusion of
Slant pockets Patch pockets
stylight.caprovides practical storage for daily essentials.
- Value
At 195 CAD (~135 USD), it's 50 USD less than Tekla's mainline.
Why this is supported
The shorts retail for
from $195.00
stylight.caCAD, approximately USD 135. In comparison, Tekla's own mainline poplin shorts are priced at
$185
teklafabrics.comUSD. The lower price is achieved by omitting French seams and stonewashing, while retaining the 100% organic cotton poplin and unisex oversized silhouette.
- Sustainability
100% organic cotton, GOTS-certified, made in Portugal.
Why this is supported
The cotton is
GOTS certified
teklafabrics.comand the shorts are
Made in Portugal
teklafabrics.com, ensuring compliance with EU labor and environmental regulations.
The brand's website notes
, an independent verification that the organic cotton claim is audited across the supply chain for environmental and social standards, including safe working conditions and freedom of association.
The 100% organic cotton poplin uses a crisp plain weave that allows air circulation, keeping you cool.
Poplin has a crisp, plain weave that allows air circulation, making it ideal for warm weather.
Is the poplin fabric lightweight and breathable for summer wear, or is it more substantial?The fabric is midweight, producing a clean drape:
Midweight
harveynichols.comand
tightly woven in organic cotton for durability and a smooth, even finish
app.garmentory.com. It is GOTS certified:
. To preserve the intended fit, care instructions recommend cold or warm wash and low tumble dry, as noted:
Cotton poplin can shrink if washed in hot water or dried on high heat. To minimize shrinkage, follow the care instructions: machine wash cold or warm, tumble dry low, or flat dry.
Does the organic cotton poplin shrink significantly after washing, and should I account for this in sizing?- Waistband
Elastic waist stretches 40% and cinches with a front tie.
Why this is supported
The covered elastic waistband on size S relaxes at 37 cm and stretches to 52 cm,
1/2 WAIST RELAXED 32 34.5 37 39.5 42 44.5
birkenstock.comand
1/2 WAIST STRETCHED 47 49.5 52 54.5 57 59.5
birkenstock.com. A front tie allows adjustment:
The shorts have a covered elastic waistband with a front tie ribbon, which allows for some adjustability.
Are these shorts true to size? Should I size up for a relaxed fit?The elastic is fully encased by poplin, preventing direct skin contact and pressure marks:
Covered elastic waistband with a tie ribbon at the front
stylight.ca- Fit
High rise, wide leg, above-knee inseam, with midweight drape.
Why this is supported
The front rise on size S is 34.5 cm, placing the shorts above the natural waist:
FRONT RISE INCL. WAISTBAND 32.5 33.5 34.5 35.5 36.5 37.5
birkenstock.comThe leg opening on size M is 78 cm total (half-hem 39 cm), nearly matching the hip width for a straight, barrel silhouette:
1/2 HEM LEG WIDTH 35.25 36.5 37.75 39 40.25 41.5
birkenstock.comThe inseam is short, staying above the knee:
INSEAM 16 17 18 18 19 19
birkenstock.comThe midweight organic cotton poplin holds the shape:
Midweight
harveynichols.comand
tightly woven in organic cotton for durability and a smooth, even finish
app.garmentory.comThe unisex cut scales proportionally across heights; a model at 190 cm (6'3") wears size M:
Model: 190 cm (6'3'), 84 kg (185 lbs), wearing size M.
careofcarl.com- Sizing
True to size; XXS-XL fits relaxed waist 64–89 cm (25–35 in).
Why this is supported
Harvey Nichols states:
This style runs true to size
harveynichols.comand Care of Carl advises:
True to size. We recommend choosing your usual size.
careofcarl.comThe unisex size run XXS–XL covers relaxed waist half-measurements:
1/2 WAIST RELAXED 32 34.5 37 39.5 42 44.5
birkenstock.comwhich translates to full waist 64–89 cm (25–35 in).
- Care
Wash cold and tumble dry low to avoid shrinkage.
Why this is supported
The cotton poplin can shrink if washed in hot water or dried on high heat:
Cotton poplin can shrink if washed in hot water or dried on high heat.
Does the organic cotton poplin shrink significantly after washing, and should I account for this in sizing?Therefore, following care instructions—machine wash cold or warm and tumble dry low—preserves the intended fit.
- Exclusivity
Exclusive to Le 31 at Simons; Birkenstock's first apparel collaboration.
Why this is supported
The collaboration shorts are designated
Birkenstock x Tekla at Le 31
stylight.ca, confirming their exclusive release through Simons' Le 31 concept. Vogue reports that
it’s the first time Birkenstock has ventured into the realm of apparel
vogue.com.
- Ethical production
GOTS certified organic cotton, made in Portugal like the mainline.
Why this is supported
The shorts are
GOTS certified
teklafabrics.comand
Made in Portugal
teklafabrics.com, matching the mainline's ethical production credentials.
- Pockets
Front slant and rear patch pockets hold essentials for errands.
Why this is supported
Front slant pockets and rear patch pockets provide enough capacity for a phone or wallet without adding bulk.
Slant pockets Patch pockets
stylight.caThis design is intentionally suited for day-to-night wear, as Vogue describes:
which are just as suitable to wear out and about as they are on the sofa
vogue.comThe combination of pockets and the adjustable waistband supports this transition.
- Fabric
Lightweight, breathable organic cotton poplin with a crisp hand that softens with washing.
Why this is supported
Third-party sources characterize the poplin as
Midweight
harveynichols.comand
tightly woven in organic cotton for durability and a smooth, even finish
app.garmentory.com. Unlike the slightly stonewashed mainline Tekla shorts (the latter noted as
- Slightly stonewashed for a soft feel
asphaltgold.com), this pair starts crisper and will soften with washing. The
Covered elastic waistband with a tie ribbon at the front
stylight.caensures that the fabric's smooth finish is the only interface with skin, preventing chafing.
- Shrinkage
Machine wash cold and tumble dry low to prevent shrinkage that affects fit and drape.
Why this is supported
The organic cotton poplin is not pre-shrunk; user-reported evidence indicates that failing to machine wash cold and tumble dry low can cause significant shrinkage, compromising the intended relaxed fit and crisp drape. The product's care instructions are therefore essential to maintain the fabric's characteristics and performance.
- Durability
Tightly woven organic cotton poplin holds up to regular machine washing and daily wear.
Why this is supported
The brand's description states the fabric is
tightly woven in organic cotton for durability and a smooth, even finish
app.garmentory.com. Additionally, Vogue describes the shorts as
which are just as suitable to wear out and about as they are on the sofa
vogue.com, confirming they are built to handle daily wear beyond sleepwear.
- Patina
Repeated washing softens the cotton and develops a patina while maintaining structure.
Why this is supported
According to the brand,
the shorts are designed to continue softening and developing a richer, more personal patina with each wash
How stonewashing affects feel and aging — aging_and_patina. The Sand color is expected to gently lighten as the fabric becomes drapier, all while retaining structural integrity.
- Color accuracy
Sand is a light beige warm neutral — not white — that pairs with earth tones.
Why this is supported
The product's Q&A explains that
The 'Sand' color is a light beige tone, similar to natural sand. It is not white, but a warm neutral that falls between beige and tan.
What is the actual color of 'Sand'? Is it closer to beige or white in person?This clarifies that Sand is not pure white, and its warm neutral tone serves as a versatile base for coordinating with other earth tones and cream loungewear.
- Color aging
Sand color lightens gradually with each wash due to stonewashing finish.
Why this is supported
Deep research on the product's stonewashing indicates that
the Sand color will gently lighten and the fabric will become drapier without losing integrity
How stonewashing affects feel and aging — aging_and_patina.
- Color consistency
This Sand color matches Tekla's mainline Hopper Stripes color.
Why this is supported
The product research confirms that this collaboration piece is
in the same Hopper Stripes colorway
How it compares to other luxury sleep shorts — mainline_priceas the Tekla mainline, ensuring color consistency for buyers familiar with the brand.
- Versatility
Designed for both sleep and street wear.
Why this is supported
The shorts were designed for both sleep and street wear: the collaboration brief says they are
just as suitable to wear out and about as they are on the sofa
vogue.com. The campaign reinforces this by showing people
move between a bustling metropolis and a tranquil home
tag-walk.com. Practical design features include
Slant pockets Patch pockets
stylight.caand a
Covered elastic waistband with a tie ribbon at the front
stylight.ca. The neutral Sand color further aids easy pairing with daywear tops.
- Origin
Made in Portugal, subject to EU labor and environmental regulations
Why this is supported
The product is marked
Made in Portugal
teklafabrics.com, indicating manufacturing under EU labor and environmental laws, which adds ethical accountability beyond the GOTS certification and aligns with a textile tradition known for quality production.
- Design story
Shorts are suitable for both lounging and outings, reflecting the Tokyo campaign's city-to-home narrative.
Why this is supported
The collection's campaign, shot in Tokyo by Ben Beagent, depicts a dream-like journey from a busy city to a peaceful home, as described in tag-walk.com:
The collection campaign follows a group of people as they move between a bustling metropolis and a tranquil home with gardens in a dream-like state, captured by Ben Beagent in Tokyo, Japan.
tag-walk.com. This narrative is directly tied to the shorts' design capability: Vogue reports that they are
which are just as suitable to wear out and about as they are on the sofa
vogue.com. The Sand color, described in a buyer Q&A as
The 'Sand' color is a light beige tone, similar to natural sand
What is the actual color of 'Sand'? Is it closer to beige or white in person?, connects the garment to the natural, neutral tones of the campaign imagery, reinforcing the overall calm mood.
- Wearability
Men's shorts with a unisex oversized fit, chafe-free waistband, pockets, and structured drape for all-day comfort.
Why this is supported
The unisex oversized fit is demonstrated by a model size example:
Model: 190 cm (6'3'), 84 kg (185 lbs), wearing size M.
careofcarl.com(the brand also states a 5'9" woman wears size S). The practicality for daily use is supported by the inclusion of
Slant pockets Patch pockets
stylight.ca, which provide real carrying capacity. The comfort is enhanced by
Covered elastic waistband with a tie ribbon at the front
stylight.ca, which prevents chafing, and the
Midweight
harveynichols.compoplin fabric provides a structured drape that keeps the silhouette clean, making the shorts appropriate for settings beyond the bedroom.
- Size range
Sizes S-XL fit 25–35 waists; true-to-size sizing seen on models 5'9 (S) and 6'3 (M).
Why this is supported
Birkenstock x Tekla provides sizing that spans S through XL. A 190 cm male model wears size M,
Model: 190 cm (6'3'), 84 kg (185 lbs), wearing size M.
careofcarl.comwhile a 175 cm female model is in size S. Both Harvey Nichols and Care of Carl confirm
This style runs true to size
harveynichols.comand
True to size. We recommend choosing your usual size.
careofcarl.com. The relaxed waist circumference ranges from 74 cm (29") on small to 89 cm (35") on XL, with elastic stretch adding another 30 cm.
- Silhouette
Oversized silhouette: wide leg (78 cm hem), short inseam (17–19 cm), and high rise (34.5 cm on S) prevent a sloppy look.
Why this is supported
The shorts achieve their oversized silhouette through voluminous width rather than length.
1/2 HEM LEG WIDTH 35.25 36.5 37.75 39 40.25 41.5
birkenstock.comyields a 78 cm leg opening on size M. Meanwhile, the
INSEAM 16 17 18 18 19 19
birkenstock.comincreases only 2 cm from S to XL, so the shorts remain above the knee. Additionally, the
FRONT RISE INCL. WAISTBAND 32.5 33.5 34.5 35.5 36.5 37.5
birkenstock.comgives a high-waisted sit above the natural waist, suiting longer torsos and polishing the lounging silhouette.
Image Analysis
2 images- 01
Product
A pair of lightweight striped pajama shorts laid flat showing the front; elasticated waistband with visible fabric drawstring and vertical narrow stripes on a light background.
- Overall silhouetteBoxy short silhouette displayed flat with a straight hem and slight outward flare from the waistband.
1 region
x 0.08 · y 0.25 · w 0.84 · h 0.45 (high) - WaistbandElasticated waistband with gathered fabric forming multiple narrow channels; top edge runs horizontally across the top of the shorts.
1 region
x 0.08 · y 0.25 · w 0.84 · h 0.12 (high) - DrawstringTwo narrow fabric drawstring tails emerging from the center front below the waistband, ending in small angled tips.
1 region
x 0.45 · y 0.33 · w 0.10 · h 0.18 (high) - Stripe patternEvenly spaced vertical narrow stripes running the full length of the shorts; stripes are darker than the background and maintain consistent width.
1 region
x 0.20 · y 0.32 · w 0.60 · h 0.36 (high) - Fabric appearanceSmooth lightweight woven fabric with a slightly crisp poplin look and soft drape indicated by shallow vertical folds.
1 region
x 0.08 · y 0.25 · w 0.84 · h 0.45 (medium)
Other
Product photographed flat on a neutral light gray background with soft shadow below; centered composition and even lighting.
- Background and stagingNeutral light gray background with the shorts centered and isolated; no additional props visible.
- ShadowSoft diffuse shadow visible beneath the hem, most pronounced at the center-bottom of the image.
1 region
x 0.36 · y 0.62 · w 0.28 · h 0.08 (high) - View and croppingFront-facing flat lay view of the shorts showing the full front face; image is vertically centered with ample margin above the waistband.
Colors
warm off-white· main fabric background#F4F1EBdark brown· stripe lines- Overall silhouetteBoxy short silhouette displayed flat with a straight hem and slight outward flare from the waistband.
- 02
Product
Rear view of a pair of striped pyjama shorts laid flat showing elasticated waistband, two back pockets, and vertical stripe pattern on a light background.
- View and orientationBack side of shorts shown flat and centered, waistband at top and leg openings at bottom.
1 region
x 0.12 · y 0.16 · w 0.76 · h 0.68 (high) - WaistbandElasticated waistband with evenly spaced horizontal gathers across full width; waistband is same striped fabric as body.
1 region
x 0.18 · y 0.16 · w 0.64 · h 0.10 (high) - Back pockets - upper weltTwo narrow horizontal welt pocket openings placed symmetrically on left and right, each with a short horizontal double-stripe trim at the welt edge.
2 regions
x 0.27 · y 0.30 · w 0.18 · h 0.06 (high); x 0.55 · y 0.30 · w 0.18 · h 0.06 (high) - Back pockets - patchRectangular patch pockets positioned below the welt openings; pockets cut from same striped fabric so vertical stripes align with garment.
2 regions
x 0.22 · y 0.36 · w 0.24 · h 0.24 (high); x 0.54 · y 0.36 · w 0.24 · h 0.24 (high) - Center rear seam and pleatSlight central vertical seam or fold runs from waistband toward crotch area, producing a small inverted pleat at the bottom center hem.
1 region
x 0.46 · y 0.28 · w 0.08 · h 0.44 (high) - Fabric patternAll-over narrow vertical stripes alternating dark narrow lines on a light cream background; stripes continue uninterrupted across panels and pockets.
1 region
x 0.18 · y 0.20 · w 0.64 · h 0.60 (high) - Small label detailSmall rectangular sewn label located at the right upper welt pocket near the pocket opening; text on label not legible at this resolution.Partial
1 region
x 0.68 · y 0.30 · w 0.03 · h 0.03 (medium)
Other
Simple studio product shot on a neutral light gray background with a faint shadow below the garment; shorts centered in frame.
- Background and stagingShorts photographed flat against a uniform light gray background with soft shadow visible beneath the hem indicating overhead lighting.
- Crop and framingGarment occupies lower two thirds of the image with substantial empty space above the waistband; entire product is visible and unobstructed.
1 region
x 0.05 · y 0.00 · w 0.90 · h 0.95 (high) - Image claritySharp focus showing fabric texture and stitching details; small label text is too small to read clearly.
Colors
warm cream· shorts main fabricdark brown stripe· stripe lines- View and orientationBack side of shorts shown flat and centered, waistband at top and leg openings at bottom.