Le 31
Essential Wool-Blend Suit Jacket London Fit - Semi-Slim
This is an Essential Wool-Blend Suit Jacket in London Fit (semi-slim) from Le 31 by Simons, available in dark navy. It is a single-breasted, two-button jacket with notch lapels, piped flap pockets, side vents, and a chest welt pocket, designed to narrow at the waist with regular sleeves. The jacket is made from a slight-stretch European fabric of wool and recycled polyester with a thin lining, suitable for formal and business wear, and coordinates with matching vest (12016-219235) and trousers (12016-219278).
- Material
- Wool and recycled polyester blend
- Gender
- male
- Style
- classic, formal, slim-fit
- Category
- Apparel & Accessories > Clothing > Suits
Specifications
Semi-slim fit suit jacket with a wool-polyester blend fabric, featuring piped flap pockets and side vents.
London fit, narrow waist, regular sleeves, slight-stretch European fabric, thin lining
- Material
- Wool and recycled polyester blend
- Secondary
- polyester
- Style
- classic, formal, slim-fit
- Occasion
- work, interview, formal
- Gender
- male
- Age Group
- adult
- Condition
- new
- Category
- Apparel & Accessories > Clothing > Suits
Additional Attributes
- Designed in Canada exclusive by Simons
- London fit semi-slim silhouette
- Narrows at the waist
- Regular sleeves
- Piped flap pockets
- Side vents
- Slight-stretch European fabric
- Wool and recycled polyester blend
- Thin lining
- Matching vest available
- Matching pant available
Product Insights
Le 31 Essential Wool-Blend Suit Jacket London Fit - Semi-Slim is a 350 CAD in-stock semi-slim business/formal-day separate cut to drop 7, so a 40 jacket is patterned for a 33 trouser; sold as separates, order jacket, vest and pant together for one dye lot. Its core promise is desk-day shape and press: 41% polyester springs creases out and holds a press all day, 4% elastane lets the narrowed semi-slim waist bend and sit without losing shape, and slight stretch gives about 2.5 cm across the chest without knitwear-level stretch; two side vents let the back spread when seated while the taper stays below the drop. Length grading covers regular 36-48, short 42-44 and long 42-46 by height, each step adding about 2 cm of sleeve, with regular sleeves and short/long sizing sparing alteration costs. Fabric and lining use recycled-bottle polyester, about 98% of recycled polyester coming from drink bottles, made with less energy and lower greenhouse-gas emissions than virgin polyester, but this is bottle-derived PET that is not a closed loop, and the wool-polyester blend cannot be separated economically so the jacket will not be recycled again. The main tradeoff is a soft, slightly stretchy drape that trades pure wool's crisp hang and breathability for durability and easy care: comfortable for a climate-controlled office day but warm in an uncooled or humid room, and high heat or heavy water can distort the 4% elastane. It is a lower-priced, softer-draping alternative to the all-wool Paulo de Oliveira London-fit suit, without its dry hand, using 1950s wash-and-wear cloth logic rather than a cost shortcut. Tailoring is business default: piped flap hip pockets are jetted pockets with a covering flap, both flaps tuck inside for formal evening if kept symmetric, and they hide phone-and-wallet strain, though flap pockets are not traditional for black tie. Colourway affects formality and pairing: Indigo/Dark Blue is called a brighter, sportier mid-blue that leans purple, so pair it with teal, gold, blush and warm neutrals, not warm reds, while Black is the safer formal pick.
Verified claims
- Colourway
- The jacket is offered in dark navy, which reads as a true formal navy rather than a brighter, sportier blue.
- Fit
- London-fit semi-slim cut that narrows at the waist with regular sleeves; short and long lengths spare alteration costs.
- Length grading
- Regular length spans 36-48 while short is 42-44 and long 42-46; lengths grade by height, each step adding about 2 cm of sleeve.
- Stretch
- Slight stretch comes from 4% elastane in the European wool blend and gives about 2.5 cm across the chest, not knitwear-level stretch.
- Side vents
- Two side vents let the back spread when you sit; the taper stays below the drop where vents gape.
- Breathability
- Comfortable for a climate-controlled office day, but runs warm in an uncooled or humid room
- Wool comparison
- Trades pure wool's crisp drape and breathability for durability and easy care
- Material
- Fabric and lining both use recycled-bottle polyester; about 98% of recycled polyester comes from drink bottles.
- Footprint
- Recycled polyester is made with less energy and lower greenhouse-gas emissions than virgin polyester.
- Recycled content
- Recycled content is bottle-derived PET that saves virgin feedstock but is not a closed loop.
- Recyclability
- Wool-polyester blends cannot be separated economically, so this jacket will not be recycled again.
- Wrinkle recovery
- The 41% polyester share springs creases out and holds a press all day
- Shape retention
- The 4% elastane lets the narrowed semi-slim waist bend and sit without losing shape
- Drape
- A soft, slightly stretchy drape, without the crisp hang of a pure-wool suit
- Pocket style
- Cut-in piped flap hip pockets and a welt chest pocket read as smart business tailoring, not black tie.
- Flap tucking
- Both pocket flaps tuck inside for a formal evening — keep them symmetric.
- Pocket function
- Flaps hide the pocket strain from carrying a phone and wallet.
- Tailoring
- Tailoring: the piped flap hip pockets are jetted pockets with a covering flap, the business-suit default.
- Formality
- Formality: a business and formal-day suit; flap pockets are not traditional for black tie.
- Dye lot matching
- Sold as separates, so order the jacket, vest and pant together to get one dye lot
- Drop 7 pairing
- Le 31 fits are cut to drop 7: a 40 jacket is patterned for a 33 trouser
- Blend vs pure wool
- Lower-priced, softer-draping alternative to the all-wool Paulo de Oliveira London-fit suit, without its dry hand.
- Care
- High heat and heavy water can distort the 4% elastane that gives the jacket its slight stretch.
- Blend lineage
- The wool-polyester blend keeps its press through a desk day: 1950s wash-and-wear cloth, not a cost shortcut
- Shoulder construction
- The jacket uses a lightly constructed shoulder rather than a heavily padded, board-stiff one, with a softer, more natural shoulder line and an easy, unforced chest.
- Athletic fit
- For a true athletic build with a large chest-to-waist drop, buy for shoulders and chest and plan to tailor the waist; if between sizes, size up and take the waist in.
Product record
- Title
- Essential Wool-Blend Suit Jacket London Fit - Semi-Slim
- Brand
- Le 31
- Price
- 350 CAD
- Availability
- In stock
- Rating
- 2 reviews
Buying Guide
1 comparison · 7 sourcesProduct comparison
Compared within this brand.
| Essential Wool-Blend Suit Jacket London Fit - Semi-Slim: Choose this if you want a semi-slim London fit jacket that narrows at the waist with regular sleeves, in a dark navy two-button, single-breasted style with notch lapels and flap hip pockets. It suits shoppers who prefer a fabric with slight stretch, made from a blend of 55% responsible wool, 41% recycled-bottle polyester and 4% elastane with a thin recycled-polyester lining. Keep in mind the hem length and tapered-waist look are shown as worn on the model, so fit on you may differ.[1,2,3] | Minimalist Wool-Blend Suit Jacket Berlin Fit - Regular: Choose this if you want a minimalist, single-breasted two-button jacket in Le 31's Berlin fit - Regular, which is tailored for ease of movement, in Black or Indigo/Dark Blue across sizes 38 to 50. Its slight-stretch European fabric blends 55% responsible wool with recycled-bottle polyester and a touch of elastane for a smooth, matte look, and a matching pant is sold separately. Note that the lining is 100% polyester and long sizes are limited to 42, 44, and 46.[4,5] | Stretch Wool Suit Jacket London Fit - Semi-Slim: Choose this if you want a semi-slim London-fit jacket that narrows at the waist with a soft drape for a comfortable, elegant look. The stretch fabric blends 55% responsible wool, 41% polyester made from recycled plastic bottles, and 4% elastane, with a thin lining, notch lapels, two-button single-breasted front, flap pockets, side vents, and matching pants sold separately (catalog items 12016-217212 and 12016-217211). It comes in Light Grey and Pine/Bottle Green in regular sizes 36 through 46, though the saved listing shows a 46-LONG option only for Light Grey.[6,7] |
Image Analysis
3 images- 01
Product
Front three-quarter view of a dark navy two-button suit jacket worn by a model; visible jacket details include notch lapels, a welt chest pocket, flap hip pockets, and two dark front buttons. A white dress shirt and slim black tie are visible under the jacket; matching navy trousers are partially visible.
- Overall silhouetteSingle-breasted suit jacket shown on a model in a three-quarter front pose, with a slightly tapered waist and structured shoulders.
1 region
x 0.18 · y 0.15 · w 0.64 · h 0.68 (high) - Lapel styleNotch lapels with a moderate width and a clean, narrow notch visible on the left lapel.
1 region
x 0.34 · y 0.18 · w 0.20 · h 0.18 (high) - Front closureTwo dark round front buttons; the top button is fastened while the lower button is unfastened.
1 region
x 0.44 · y 0.42 · w 0.11 · h 0.16 (high) - Chest pocketHorizontal welt chest pocket on the left side (model right), aligned with the lapel seam.
1 region
x 0.60 · y 0.28 · w 0.12 · h 0.06 (high) - Hip pocketsFlap hip pockets on both sides; left flap pocket (model right) is visible and lies flat against the jacket.
2 regions
x 0.30 · y 0.48 · w 0.18 · h 0.10 (high); x 0.56 · y 0.52 · w 0.18 · h 0.12 (high) - Sleeve cuffsStraight sleeve hems with a small visible white cuff of the shirt at the left wrist (model right).
2 regions
x 0.20 · y 0.72 · w 0.18 · h 0.18 (high); x 0.64 · y 0.44 · w 0.15 · h 0.30 (high) - Jacket fabric appearanceUniform dark navy suiting fabric with a smooth, matte finish and no visible pattern from this distance.
1 region
x 0.18 · y 0.15 · w 0.64 · h 0.68 (high) - TrousersMatching navy trousers visible from the waist downward, with a smooth front and side seam; left hand partly covering the right thigh.
1 region
x 0.28 · y 0.66 · w 0.44 · h 0.28 (high) - Underlayer clothingCrisp white dress shirt with a point collar worn under the jacket; a slim black tie is knotted at the collar and hangs down the jacket opening.
2 regions
x 0.38 · y 0.16 · w 0.24 · h 0.22 (high); x 0.46 · y 0.24 · w 0.08 · h 0.28 (high)
Other
Studio shot with a white seamless background showing a cropped three-quarter view of the model; even soft lighting with minimal shadows and the model's left hand resting in the trouser pocket.
- Background and lightingPlain bright white background with even soft studio lighting and minimal visible shadows.
1 region
x 0.00 · y 0.00 · w 1.00 · h 1.00 (high) - Model pose and croppingModel faces forward in a slight three-quarter pose; image is cropped near mid-thigh so lower legs are not visible.
1 region
x 0.12 · y 0.05 · w 0.76 · h 0.90 (high) - Hand placementModel's right hand is relaxed and visible at the left lower frame near the thigh; model's left hand is placed in the trouser pocket.
2 regions
x 0.14 · y 0.72 · w 0.16 · h 0.20 (high); x 0.60 · y 0.58 · w 0.18 · h 0.30 (high) - Image qualitySharp, high-resolution image with clear detail and accurate color rendering under studio lights.
Colors
dark navy· jacket fabric#232533dark navy· trousers fabric#222433white· dress shirt#CACACDblack· tie- Overall silhouetteSingle-breasted suit jacket shown on a model in a three-quarter front pose, with a slightly tapered waist and structured shoulders.
- 02
Product
Full suit shown on a model: a two-button single-breasted navy jacket with a matching five-button vest and straight-leg navy trousers; white dress shirt and black tie; black leather lace-up shoes visible at hem.
- Jacket silhouetteSingle-breasted jacket with notch lapels, two visible front buttons, flap pockets at hip level, a welt chest pocket on the left, long sleeves with a small white shirt cuff showing at each wrist, and a straight hem that falls to the upper thigh.
1 region
x 0.23 · y 0.12 · w 0.54 · h 0.38 (high) - Waistcoat / vestMatching single-breasted five-button vest visible under the jacket with the top of the vest forming a V opening above the jacket buttons.
1 region
x 0.36 · y 0.18 · w 0.28 · h 0.22 (high) - TrousersStraight-leg matching navy trousers with a pressed crease visible along the front of each leg and a slim, semi-slim fit from hip to ankle.
1 region
x 0.30 · y 0.50 · w 0.40 · h 0.42 (high) - Shirt collar and cuffsWhite dress shirt with a pointed collar visible above the jacket lapel and white shirt cuffs peeking beyond the jacket sleeves.
3 regions
x 0.39 · y 0.14 · w 0.22 · h 0.12 (high); x 0.24 · y 0.40 · w 0.12 · h 0.08 (high); x 0.64 · y 0.40 · w 0.12 · h 0.08 (high) - NecktieSolid black narrow tie centered under the collar extending to the mid-torso.
1 region
x 0.47 · y 0.16 · w 0.06 · h 0.28 (high) - ShoesBlack leather lace-up shoes with a lug sole visible at the bottom of the frame.
1 region
x 0.36 · y 0.88 · w 0.28 · h 0.10 (high)
Other
Studio product shot showing a full-body male model centered against a plain light gray background with even front lighting and soft shadow on the floor; image framed to include full figure and some space above the head.
- Shot compositionFull-body frontal studio shot with the model standing facing the camera, centered vertically and horizontally in the frame.
- Background and lightingUniform light gray background and floor with even, diffuse frontal lighting producing minimal harsh shadows and a soft shadow beneath the model's feet.
- Image qualityHigh resolution with sharp detail on fabric texture, seams, and facial features; no visible noise or motion blur.
Colors
navy· jacket, vest and trousers#27293Awhite· dress shirt#CBCACDblack· tie and shoes#0D0D0E- Jacket silhouetteSingle-breasted jacket with notch lapels, two visible front buttons, flap pockets at hip level, a welt chest pocket on the left, long sleeves with a small white shirt cuff showing at each wrist, and a straight hem that falls to the upper thigh.
- 03
Product
Rear view of a dark navy suit jacket on a model showing the back panel, collar, sleeves, and hem.
- Back panelSingle continuous back panel with a vertical center back seam running from the collar to the hem.
1 region
x 0.22 · y 0.12 · w 0.56 · h 0.72 (high) - Collar and upper backNotch-style jacket collar visible from the rear with a crisp roll; white shirt collar visible above the jacket collar.
1 region
x 0.36 · y 0.05 · w 0.28 · h 0.12 (high) - Sleeve cuffsEach sleeve ends in a tailored cuff with a row of closely spaced dark buttons; three buttons are visible on the right cuff and three on the left cuff.
2 regions
x 0.07 · y 0.64 · w 0.18 · h 0.24 (medium); x 0.75 · y 0.64 · w 0.18 · h 0.24 (medium) - Hem and lengthJacket hem falls below the waist and covers the top of the trousers, with a straight horizontal hemline.
1 region
x 0.22 · y 0.66 · w 0.56 · h 0.22 (high) - Fabric appearanceSmooth, tightly woven fabric with a subtle uniform finish and slight sheen consistent across the back and sleeves.
Other
Studio shot of a model from the rear against a plain light gray background; model head and hands are visible and evenly lit with soft shadows.
- Background and lightingEven, neutral light gray backdrop with soft, diffuse studio lighting and minimal shadowing.
- Model presenceMale model shown from the rear with head, neck, and hands visible; model's hair and neck interrupt the top of the jacket collar.
2 regions
x 0.36 · y 0.00 · w 0.28 · h 0.10 (high); x 0.24 · y 0.78 · w 0.52 · h 0.18 (medium) - Image framingVertical portrait framing centered on the model's back, with slight cropping at the top of the head and full visibility of the jacket back.
Colors
dark navy· jacket main body#252739dark black· sleeve cuff buttons#1B1B24- Back panelSingle continuous back panel with a vertical center back seam running from the collar to the hem.
Variants
23 SKUs| SKU | Title | Price | Avail |
|---|---|---|---|
| 4160556 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Black - 36-Reg. | CA$350.00 | Yes |
| 4160558 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Black - 38-Reg. | CA$350.00 | Yes |
| 4160560 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Black - 40-Reg. | CA$350.00 | Yes |
| 4160561 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Black - 42-Short | CA$350.00 | Yes |
| 4160562 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Black - 42-Reg. | CA$350.00 | Yes |
| 4557936 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Black - 44-Short | CA$350.00 | Yes |
| 4160563 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Black - 44-Reg. | CA$350.00 | Yes |
| 4160564 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Black - 44-Long | CA$350.00 | Yes |
| 4160565 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Black - 46-Reg. | CA$350.00 | Yes |
| 4160566 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Black - 46-Long | CA$350.00 | Yes |
| 4160567 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Black - 48-Reg. | CA$350.00 | Yes |
| 4253236 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Indigo/dark Blue - 36-Reg. | CA$350.00 | Yes |
| 4253238 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Indigo/dark Blue - 38-Reg. | CA$350.00 | Yes |
| 4253240 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Indigo/dark Blue - 40-Reg. | CA$350.00 | Yes |
| 4253241 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Indigo/dark Blue - 42-Short | CA$350.00 | Yes |
| 4253242 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Indigo/dark Blue - 42-Reg. | CA$350.00 | Yes |
| 4286561 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Indigo/dark Blue - 42-Long | CA$350.00 | Yes |
| 4557939 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Indigo/dark Blue - 44-Short | CA$350.00 | Yes |
| 4253243 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Indigo/dark Blue - 44-Reg. | CA$350.00 | Yes |
| 4253244 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Indigo/dark Blue - 44-Long | CA$350.00 | Yes |
| 4253245 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Indigo/dark Blue - 46-Reg. | CA$350.00 | Yes |
| 4253246 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Indigo/dark Blue - 46-Long | CA$350.00 | Yes |
| 4253247 | Essential Wool-Blend Suit Jacket London Fit - Semi-Slim - Indigo/dark Blue - 48-Reg. | CA$350.00 | Yes |
Documents & Data
Customer Reviews
2 total2 reviews · out of 5
Classic casual jacket
Great colour (a brighter, more sporty blue than navy), superb fit
Nice suit
Beautiful suit. Good quality