Hopper Stripes Poplin Pyjama Short

Verified claims

Collaboration

First Birkenstock apparel and Tekla footwear, exclusive to Simons with Tokyo campaign.

Daywear design

Designed for out-of-bedroom wear with no-rub waistband and practical pockets.

Value

At 195 CAD (~135 USD), it's 50 USD less than Tekla's mainline.

Sustainability

100% organic cotton, GOTS-certified, made in Portugal.

Waistband

Elastic waist stretches 40% and cinches with a front tie.

Fit

High rise, wide leg, above-knee inseam, with midweight drape.

Sizing

True to size; XXS-XL fits relaxed waist 64–89 cm (25–35 in).

Care

Wash cold and tumble dry low to avoid shrinkage.

Exclusivity

Exclusive to Le 31 at Simons; Birkenstock's first apparel collaboration.

Ethical production

GOTS certified organic cotton, made in Portugal like the mainline.

Pockets

Front slant and rear patch pockets hold essentials for errands.

Fabric

Lightweight, breathable organic cotton poplin with a crisp hand that softens with washing.

Shrinkage

Machine wash cold and tumble dry low to prevent shrinkage that affects fit and drape.

Durability

Tightly woven organic cotton poplin holds up to regular machine washing and daily wear.

Patina

Repeated washing softens the cotton and develops a patina while maintaining structure.

Color accuracy

Sand is a light beige warm neutral — not white — that pairs with earth tones.

Color aging

Sand color lightens gradually with each wash due to stonewashing finish.

Color consistency

This Sand color matches Tekla's mainline Hopper Stripes color.

Versatility

Designed for both sleep and street wear.

Origin

Made in Portugal, subject to EU labor and environmental regulations

Design story

Shorts are suitable for both lounging and outings, reflecting the Tokyo campaign's city-to-home narrative.

Wearability

Men's shorts with a unisex oversized fit, chafe-free waistband, pockets, and structured drape for all-day comfort.

Size range

Sizes S-XL fit 25–35 waists; true-to-size sizing seen on models 5'9 (S) and 6'3 (M).

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.

Product record

Title

Hopper Stripes Poplin Pyjama Short

Brand

Birkenstock x Tekla

Price

195 CAD

Availability

In stock

Unisex oversized fit and sizing guide

• The official size chart shows a size S half-waist relaxes at 37 cm and stretches to 52 cm, giving 15 cm of extra circumference — a nearly 40% yield that makes the elastic waistband exceptionally forgiving and central to the one-size-fits-many unisex approach.
• Listed as midweight by Harvey Nichols, the cotton poplin has sufficient body to keep the wide legs hanging cleanly rather than collapsing; the tight, smooth weave further maintains a crisp line so the oversized silhouette reads as architectural rather than shapeless.
• With a front rise of 34.5 cm on size S, the shorts sit above the natural waist in a high-rise silhouette that references classic pajama styling and prevents a gap when worn with the matching button-down shirt.
• Relaxed waist measurements start at 64 cm (about 25") for XXS and reach 89 cm (35") for XL, with the elastic stretching those figures even further — this spread is how the same unisex pattern accommodates both smaller women and larger men.
• The half-hem on a size M is 39 cm, yielding a 78 cm total leg opening that nearly matches the hip width — this straight, almost barrel-like shape is what gives the shorts their airy, oversized character instead of a tapered at-home short.
• Harvey Nichols and Care of Carl both confirm the shorts run true to size, so selecting your regular size delivers the intended relaxed, unisex drape without needing to size up — a consistent message across retailers.
• Inseam lengths range only from 16 cm (XXS) to 19 cm (XL), so the shorts remain consistently above the knee across the size run; the oversized feel comes from volume in the width and rise, not from added length.
• A female model at 175 cm / 5'9" wears size S and a male model at 190 cm / 6'3" wears size M, demonstrating that the unisex cut scales proportionally in rise and volume to look intentionally oversized on a variety of body heights.

Fabric finish and construction details

• Manufacturing in Portugal places the shorts within a country with a long-standing textile tradition and the EU's rigorous labor and environmental regulations, adding another layer of assurance to the ethical production already signalized by GOTS.
• The shorts carry Global Organic Textile Standard certification, which audits the entire textile supply chain from raw cotton to finished product for both organic integrity and social criteria like safe working conditions and freedom of association, meaning the 'organic' claim is independently verified rather than self-declared.
• The presence of both front slant pockets and rear patch pockets gives these shorts real carrying capacity — enough for a phone or wallet — without the bulk of cargo styling, making them more usable for morning movement than loungewear that skimps on pocketing.
• The waistband elastic is fully encased in the poplin shell, which eliminates direct rubber-to-skin contact — a detail that prevents the chafing and red pressure marks exposed bands can cause, especially during extended wear in bed.

How stonewashing affects feel and aging

• The stonewashed finish is inherently a partial aging process, so the shorts are designed to continue softening and developing a richer, more personal patina with each wash — the Sand color will gently lighten and the fabric will become drapier without losing integrity, making them more characterful over their lifespan.

The Birkenstock x Tekla collaboration story

• The shorts were crafted with slant pockets, patch pockets, and a tie-front elastic waistband specifically so they could transition from sleep to casual outings — embodying Tekla’s philosophy that comfort clothing shouldn’t be confined to the bedroom.
• The campaign, shot by Ben Beagent in Tokyo, follows a dream‑like transition from city to home — so wearing these shorts carries a subtle narrative of finding personal calm in the everyday.
• This collaboration marks the first time Birkenstock has ever designed apparel, while simultaneously being Tekla's first foray into footwear — placing these pyjama shorts at the historic intersection of two iconic brands known for comfort and craftsmanship.