
Le 31
Midnight-Blue Jean London Fit - Slim Straight
The Midnight-Blue Jean London Fit is a men's straight, slightly slim-fit five-pocket denim jean from Le 31 by Simons, designed in Canada for everyday casual wear. It is made from a stretch organic cotton blend in a dark midnight-blue wash and features a straight silhouette from thigh to ankle, a standard waistband with belt loops, front pocket openings, two back patch pockets, and full-length hems. The denim has a Jeanologia EIM score of 33, which the brand classifies as low environmental impact for treatment and washing processes.
- Color
- Midnight-Blue
- Material
- Stretch organic cotton blend
- Style
- slim-fit, straight-leg, classic, casual
- Category
- Apparel & Accessories > Clothing > Pants
Color
Specifications
Slim-straight jeans in stretch organic cotton denim with a low-impact Jeanologia EIM score, designed in Canada by Le 31 by Simons.
Stretch organic cotton denim, London slim-straight fit, 5-pocket design, Jeanologia EIM score 33 for low environmental impact.
- Color
- Midnight-Blue · blue
- Material
- Stretch organic cotton blend
- Style
- slim-fit, straight-leg, classic, casual
- Occasion
- everyday, casual, weekend, running-errands
- Gender
- male
- Age Group
- adult
- Condition
- new
- Category
- Apparel & Accessories > Clothing > Pants
Additional Attributes
- Exclusive Le 31 by Simons design
- Designed in Canada
- Stretch denim fabric
- Organic cotton blend
- Jeanologia EIM score of 33 for low environmental impact
- London fit: straight leg with a slight slim from thigh to ankle
- 5-pocket design
- Midnight-blue wash
- Slim straight silhouette
- Low-impact denim treatment and washing processes
- Comfort stretch for mobility
- Versatile everyday denim
Product Insights
Midnight-Blue Jean London Fit - Slim Straight London slim-straight cut, slightly slim from thigh to ankle Waists run 29-38 in one-inch steps, but odd waists only come in 32 inseam Offered variants use 32 and 36 inseams; a true 34 means hemming or cropping 66% organic cotton, 26% cotton, 6% viscose, 2% LYCRA elastane Jeanologia EIM score 33 covers finishing-stage water, energy and chemical impact
Verified claims
- fit
- London slim-straight cut, slightly slim from thigh to ankle
- sizing
- Order by measured natural waist, not vanity size
- sizing
- Waists run 29-38 in one-inch steps, but odd waists only come in 32 inseam
- inseam
- Offered variants use 32 and 36 inseams; a true 34 means hemming or cropping
- sizing
- Size labels are waist-inseam pairs, not one composite size
- value
- All variants are same price and in stock, so choose purely on fit
- color
- Single Navy/Midnight Blue colorway across all sizes
- material
- 66% organic cotton, 26% cotton, 6% viscose, 2% LYCRA elastane
- comfort
- 2% elastane gives movement ease in a slim-straight leg
- care
- Machine wash inside out cold; no bleach; tumble dry low; low iron; no dry cleaning
- care
- Wash new dark denim separately on the first wash
- color behavior
- Midnight blue will fade at high-wear points as part of ring-dyed denim character
- sustainability
- Jeanologia EIM score 33 covers finishing-stage water, energy and chemical impact
- sustainability
- Organic cotton is an environmental choice, not a guaranteed softness upgrade, and no third-party cert is named
- construction
- Classic 5-pocket build with belt loops, yoke and patch back pockets
- styling
- Full-length hem rests over shoes with a slight break or stack
- material
- Fabric weight is not published
- value
- 125 CAD buys an exclusive Le 31 organic-cotton stretch denim with low-impact finishing
- styling
- Dark midnight-blue wash suits casual and smart-casual outfits
Product record
- Title
- Midnight-Blue Jean London Fit - Slim Straight
- Brand
- Le 31
- Price
- 125 CAD
- Availability
- In stock
Buying Guide
1 comparison · 11 sourcesUses
Full-length hem that breaks over your shoes
Wear these Le 31 jeans full-length so the hem rests over the tops of your shoes with a slight break and a small fold where the fabric meets the shoe, as shown on the model in the product photos. The London fit runs straight and slightly slim from thigh to ankle, keeping a clean leg line down to the shoe. They also have a standard rise ending at the natural waistline.[1,3,4]
Washing new denim that releases colour
These jeans are made of denim that gives up colour when new, so the first wash should be done on its own, inside out at 30°C, since the colour transfers during that initial wash. Afterward, the jeans should never go in the tumble dryer.[2]
Product comparison
Compared within this brand.
| Midnight-Blue Jean London Fit - Slim Straight: Choose this if you want a straight leg that is slightly slim from thigh to ankle in a deep midnight-blue wash with subtle fading, made from a stretch organic cotton blend (66% organic cotton with 2% LYCRA elastane) and washed with a low environmental impact (Jeanologia EIM score of 33). It comes in a classic five-pocket design with belt loops, sized 29 to 32. Note the denim can transfer colour when new, so the first wash should be done alone, inside out at 30 degrees Celsius, and the jeans should never go in the tumble dryer.[1,2,3] | Minimalist Black Jean Stockholm Fit - Slim: Choose this if you want a slim, minimalist black jean: Le 31's Stockholm fit is slim from thigh to ankle in deep-black denim with tonal stitching, a classic five-pocket design, and a matte finish with no visible fading or distressing. The stretch blend of 90% organic cotton, 6% polyester, and 4% elastane suits shoppers who want slim-cut comfort, and the style is a Simons-exclusive Le 31 design from Canada, made in Turkey. Note that the on-body photos show the fit and ankle-length hem as worn on a seated model, so the exact look may vary with your height and build.[5,6,7,8] | Muted-Blue Jean Stockholm Fit - Slim: Choose this if you prefer a slimmer look—per the brand, the Stockholm is Le 31's slim fit from thigh to ankle, shown in a light muted-blue wash with a minimalist faded blue pigment. It is cut from stretch organic cotton denim (69% organic cotton, 30% cotton, 1% elastane) in a classic five-pocket design with a single silver button closure, offered in waist sizes 28 to 38 with 32- or 36-inch inseams.[9,10,11] |
Image Analysis
3 images- 01

Product
Right-facing seated model wearing dark navy slim-straight jeans visible from waist to hem on a seated pose; front pockets and upper thigh to ankle area are visible.
- Visible garment and poseDark navy jeans worn by a seated male model, shown from upper waist to ankles while sitting with legs extended forward and slightly apart.
1 region
x 0.18 · y 0.33 · w 0.62 · h 0.52 (high) - Front construction detailFront fly area and top of waistband are partially visible underneath a tucked light-gray pullover; a faint vertical fly seam is visible at the crotch area.
1 region
x 0.33 · y 0.37 · w 0.20 · h 0.12 (medium) - Pocket and hip areaRight front pocket opening and slight outline of left front pocket area visible along the upper thighs and hips.
2 regions
x 0.22 · y 0.36 · w 0.25 · h 0.14 (medium); x 0.47 · y 0.38 · w 0.18 · h 0.13 (medium) - Leg silhouette and cutLegs display a straight, slightly tapered silhouette from thigh to ankle consistent with a slim-straight cut; fabric lies relatively flat with minimal visible distressing.
1 region
x 0.24 · y 0.45 · w 0.50 · h 0.40 (high) - Hem and lengthPant hems end above the shoes, showing sock exposure and a slight break at the ankle when seated.
1 region
x 0.35 · y 0.75 · w 0.30 · h 0.15 (high)
Other
Lifestyle studio shot showing a seated model against a photographic backdrop of an Airstream trailer, with a chrome tubular chair and directional soft lighting from above-left.
- BackdropLarge photographic backdrop showing a silver Airstream-style trailer and cloudy sky, occupying the upper half of the image behind the model.
1 region
x 0.02 · y 0.02 · w 0.96 · h 0.40 (high) - ChairCantilever chrome tubular-frame chair with a dark seat surface; seat frame and base are visible under and behind the model.
1 region
x 0.18 · y 0.62 · w 0.55 · h 0.30 (high) - Lighting and shadowsSoft directional lighting from the upper-left casts gentle shadows under the model and the chair, producing muted highlights on chrome surfaces.
- Visible accessories and footwearModel wears black leather loafers and burgundy socks, a light-gray quarter-zip pullover, and several rings and bracelets; these are visible but not described as the product.
2 regions
x 0.56 · y 0.77 · w 0.30 · h 0.20 (high); x 0.24 · y 0.28 · w 0.40 · h 0.30 (high) - Shot compositionVertical portrait composition with the model centered slightly left of center; image crops just above the head and includes full seated figure to feet.
Colors
midnight navy· jeans- Visible garment and poseDark navy jeans worn by a seated male model, shown from upper waist to ankles while sitting with legs extended forward and slightly apart.
- 02

Product
Front view of a pair of dark navy denim jeans worn on a model from waist to shoes; visible details include waistband with belt loops, front pocket openings, center front seam, straight slim legs, and hem break over shoes.
- Overall silhouetteJeans shown on a model from waist to feet with a straight, slim-straight leg profile and a standard rise ending at the natural waistline visible under the sweater hem.
1 region
x 0.12 · y 0.12 · w 0.76 · h 0.82 (high) - Waistband and belt loopsVisible waistband with multiple belt loops around the waist; top of waistband sits under the hem of the grey sweatshirt.
1 region
x 0.28 · y 0.07 · w 0.44 · h 0.12 (high) - Front pocket openingsCurved front pocket openings visible on both sides; right hand partly inserted into the right pocket creating a slight pocket stretch.
2 regions
x 0.56 · y 0.18 · w 0.30 · h 0.20 (high); x 0.16 · y 0.22 · w 0.20 · h 0.22 (high) - Center front seam and fly areaSubtle center front seam and fly area visible with tonal topstitching running down from the waistband.
1 region
x 0.42 · y 0.10 · w 0.16 · h 0.28 (high) - Denim finish and fadingDark midnight-blue denim with subtle vertical fading and slightly lighter worn appearance on the front thigh areas compared with the inner leg and outer seams.
2 regions
x 0.18 · y 0.28 · w 0.28 · h 0.60 (high); x 0.50 · y 0.28 · w 0.30 · h 0.60 (high) - Hem and leg openingStraight hem that rests over the tops of the shoes with a slight break and a small fold where the fabric meets the shoe.
1 region
x 0.18 · y 0.78 · w 0.64 · h 0.18 (high)
Other
Studio product shot with a model cropped at mid-torso; neutral light grey background and soft studio lighting produce minimal shadows under the feet; grey sweatshirt and model hands are visible.
- Shot compositionCropped vertical studio shot showing the model from mid-torso to feet, centered horizontally with ample negative space at top and sides.
- Background and lightingEven neutral light grey background with diffuse studio lighting and soft shadow beneath the shoes.
- Visible apparel not part of main productGrey long-sleeve sweatshirt cuff and white inner layer visible at the waist and wrists; model hands are visible, one inserted in the right pocket.
2 regions
x 0.32 · y 0.02 · w 0.38 · h 0.14 (high); x 0.54 · y 0.12 · w 0.18 · h 0.18 (high) - Shoes and floorDark brown glossy loafers worn by the model and a seamless white floor meeting the light grey wall background.
1 region
x 0.12 · y 0.82 · w 0.76 · h 0.16 (high)
Colors
midnight navy· denim body- Overall silhouetteJeans shown on a model from waist to feet with a straight, slim-straight leg profile and a standard rise ending at the natural waistline visible under the sweater hem.
- 03

Product
Rear view of a pair of dark midnight-blue denim jeans on a model, showing waistband, back yoke, two patch back pockets with topstitching, center-back seam, straight-leg silhouette and full-length hems resting over shoes.
- View and fitRear-facing full-length view of jeans on a model showing a straight/slim-straight leg silhouette with relaxed fit through the leg and hems resting on the tops of the shoes.
1 region
x 0.18 · y 0.08 · w 0.64 · h 0.86 (high) - Waistband and center seamVisible waistband with a vertical center-back seam running down from the waistband to the crotch area.
1 region
x 0.45 · y 0.08 · w 0.10 · h 0.18 (high) - Back pocketsTwo symmetrical patch back pockets with slightly angled top edges and visible topstitching around the pocket perimeter.
2 regions
x 0.26 · y 0.18 · w 0.18 · h 0.18 (high); x 0.56 · y 0.18 · w 0.18 · h 0.18 (high) - Denim material and finishDenim fabric with a deep, even dark-blue wash; slight tonal variation and mild fading at pocket edges and seams.
1 region
x 0.20 · y 0.18 · w 0.60 · h 0.68 (medium) - Hem and leg openingFull-length hem that folds slightly over the shoes, showing a modest hem cuff and slight fabric stacking at the ankles.
1 region
x 0.24 · y 0.80 · w 0.54 · h 0.14 (high) - Visible stitching colorStitching visible around pockets and seams is a slightly lighter blue compared with the denim body.
1 region
x 0.26 · y 0.18 · w 0.48 · h 0.48 (medium)
Other
Studio shot with neutral white background showing part of a grey sweatshirt on the model and dark dress shoes; even soft lighting with minimal shadows.
- Background and stagingPlain white studio background and floor with no props.
- Model upper garment visibleLower portion of a light grey sweatshirt visible above the waistband, partially covering the waist area.
1 region
x 0.20 · y 0.00 · w 0.60 · h 0.18 (high) - Hands and shoes visibleBoth of the model's hands are partially visible at the sides and dark leather-style shoes are visible beneath the jeans' hems.
3 regions
x 0.06 · y 0.20 · w 0.12 · h 0.28 (high); x 0.82 · y 0.20 · w 0.12 · h 0.28 (high); x 0.34 · y 0.88 · w 0.32 · h 0.10 (high) - LightingSoft, even studio lighting producing minimal shadow and even color rendering across the garment.
Colors
midnight blue· denim bodyslate blue· stitching and pocket trim- View and fitRear-facing full-length view of jeans on a model showing a straight/slim-straight leg silhouette with relaxed fit through the leg and hems resting on the tops of the shoes.
Variants
13 SKUs| SKU | Title | Price | Avail |
|---|---|---|---|
| 4647172 | Midnight-Blue Jean London Fit - Slim Straight - Navy/midnight Blue - 29-32 | CA$125.00 | Yes |
| 4647173 | Midnight-Blue Jean London Fit - Slim Straight - Navy/midnight Blue - 30-32 | CA$125.00 | Yes |
| 4647174 | Midnight-Blue Jean London Fit - Slim Straight - Navy/midnight Blue - 30-36 | CA$125.00 | Yes |
| 4647175 | Midnight-Blue Jean London Fit - Slim Straight - Navy/midnight Blue - 31-32 | CA$125.00 | Yes |
| 4647176 | Midnight-Blue Jean London Fit - Slim Straight - Navy/midnight Blue - 32-32 | CA$125.00 | Yes |
| 4647177 | Midnight-Blue Jean London Fit - Slim Straight - Navy/midnight Blue - 32-36 | CA$125.00 | Yes |
| 4647178 | Midnight-Blue Jean London Fit - Slim Straight - Navy/midnight Blue - 33-32 | CA$125.00 | Yes |
| 4647179 | Midnight-Blue Jean London Fit - Slim Straight - Navy/midnight Blue - 34-32 | CA$125.00 | Yes |
| 4647180 | Midnight-Blue Jean London Fit - Slim Straight - Navy/midnight Blue - 34-36 | CA$125.00 | Yes |
| 4647181 | Midnight-Blue Jean London Fit - Slim Straight - Navy/midnight Blue - 36-32 | CA$125.00 | Yes |
| 4647182 | Midnight-Blue Jean London Fit - Slim Straight - Navy/midnight Blue - 36-36 | CA$125.00 | Yes |
| 4647183 | Midnight-Blue Jean London Fit - Slim Straight - Navy/midnight Blue - 38-32 | CA$125.00 | Yes |
| 4647184 | Midnight-Blue Jean London Fit - Slim Straight - Navy/midnight Blue - 38-36 | CA$125.00 | Yes |