If you train through summer, the right pair of shorts becomes the single most-worn item in your kit. The wrong pair holds sweat, traps heat, smells after one session, and falls apart inside a year. The right pair stays cool, stays fresh, moves with you — and lasts.
This is a practical guide to what actually matters when you choose workout shorts in 2026. No buzzwords, no hype. Just fabric, fit, function, and the certifications worth trusting.
1. Fabric is the first decision — and most brands get it wrong
Most performance shorts on the market are 100% polyester or a polyester/elastane blend. Polyester is cheap to produce, dries quickly, and holds dye well. It also has three problems that matter once you start training in heat.
- It traps body odour. Polyester fibres are hydrophobic — sweat sits on the surface, and the oily compounds in sweat bond to the fibre. Bacteria feed on those compounds and produce odour faster than they would on natural fabrics. This is why polyester gym clothes start to smell again the moment you put them on, even after washing.
- It sheds microplastics. Every wash releases plastic microfibres into wastewater and ultimately the ocean. Synthetic activewear is one of the largest single contributors to marine microplastic pollution.
- It feels hot. Polyester doesn't manage moisture vapour well in high humidity — it pushes liquid sweat outward, but in still summer air it traps a layer of warm, damp air against the skin.
The better options for summer training are TENCEL™ Lyocell, premium cotton, or — for high-intensity performance shorts where compression and stretch recovery matter — polyamide (nylon) with a clean anti-odour treatment. Lyocell is plant-based, made from sustainably farmed wood pulp in a closed-loop solvent process. It absorbs more moisture than cotton, releases it faster than polyester, and stays cooler against the skin in heat.
2. Fit and function: what to test before you buy
Once the fabric is right, fit decides whether you'll actually wear them. A few details worth checking:
- 4-way stretch. Two-way stretch is enough for running. For squats, lunges, padel, tennis, or any rotation-based movement, you want fabric that stretches in every direction and recovers without sagging.
- Inseam length. 5–7 inches works for running and high-intensity training. 7–9 inches is the comfortable everyday range. Above 9 inches sits closer to lifestyle than performance.
- Internal drawcord. External drawstrings ride up under heavier waistbands. Internal cords sit flat and stay adjusted through the session.
- Pockets that actually close. Open hand pockets are useless once you start moving. Zip pockets or deep internal pockets are non-negotiable if you carry a phone or keys.
- Built-in liner — or not. Some performance shorts have a built-in brief; some don't. There's no right answer, but check before you order.
3. The certifications that actually mean something
This is where most marketing falls apart. "Eco" and "sustainable" mean nothing on a label. What does mean something — especially for buyers in Germany, Austria, Switzerland and the Nordics, where consumer-protection standards run higher than most markets — is third-party certification. Three are worth knowing.
- OEKO-TEX STANDARD 100. Tests every component of a garment — fabric, thread, zips, labels, prints — against a list of hundreds of harmful substances, including those well below EU regulatory limits. If a product is OEKO-TEX certified, you know what is not in it.
- Bluesign®. Audits the manufacturing process itself — chemical inputs, water use, energy, worker safety, and emissions. Bluesign is the gold standard for production-side environmental impact in European technical apparel.
- GOTS (Global Organic Textile Standard). The benchmark for organic natural fibres — covers everything from farming through processing, dyeing and finishing. Relevant if cotton or other natural fibres are in the blend.
If a brand sells you on "sustainability" but doesn't show you at least one of these, the claim is decorative. If they show you all three, they've put the work in.
4. Anti-odour technology: not all "fresh" treatments are equal
Many performance shorts now ship with some form of anti-microbial finish. The two questions to ask: what is it made from, and how long does it last.
Conventional treatments use silver ions or zinc. They work — at first. But they wash out, often within 10–20 washes, and they release heavy metals into wastewater. PFAS-based treatments (the same chemistry behind "forever chemicals") are now being phased out across the EU under REACH.
The better path is plant-based. Treatments derived from peppermint oil (HeiQ Mint) or Nordic wood extractives (NordShield) work at the fibre level to inhibit the bacteria responsible for odour, without silver, zinc, PFAS, or heavy metals. Independently tested treatments retain 94–99% effectiveness across 20–30 washes — meaning the shorts you buy this summer are still fresh next summer.
5. The APRÍ shorts: built around all of the above
This guide describes the standard. APRÍ shorts are built to that standard.
- APRÍtech™ Airy Performance Shorts — lightweight, 4-way stretch polyamide for high-intensity training. APRÍtech™ HeiQ Mint anti-odour, plant-based, 94%+ effective after 20 washes. Internal drawcord, multiple pockets, classic fit. €119.
- APRÍshield™ Logo Sweat Shorts — premium relaxed-fit cotton for padel, tennis, gym and everyday wear. APRÍshield™ NordShield anti-odour, plant-based, 99.9% effective after 30 washes. Back and side pockets. €69.
Both are made in Portugal to European manufacturing standards. Both carry OEKO-TEX STANDARD 100, GOTS and Bluesign certification. Both come with our 30-day freshness guarantee — if they're not the freshest shorts you've ever owned, you get your money back.
Train through the heat. Wash less. Explore the APRÍ shorts collection →
Further reading: HeiQ Mint explained · OEKO-TEX, GOTS and Bluesign: what sustainable sportswear certifications actually mean · Why gym clothes still smell after washing