The Trimline 5" Biker Short holds you through training in exceptionally soft fabric, its high-rise sculpting waistband drawing a clean, unrestricted line.
Why you'll love it:
Fabric
73% Ciclo Nylon, 27% Spandex
Care
Machine wash cold, tumble dry low
Built on CiCLO® biodegradable fiber.
CiCLO® is built into our recycled synthetics to do two things: shed fewer microplastics in wear and wash, and biodegrade rather than linger. Independent testing shows CiCLO treated fibers biodegrade in under four years — so they don’t add to long-term microplastic pollution.
Certified by ECO PASSPORT by OEKO-TEX®.
| Sizing | Numeric Size | Waist (inches) |
|---|---|---|
| X-Small | 0–2 | 24–26 |
| Small | 4–6 | 26–28 |
| Medium | 8–10 | 28½–30½ |
| Large | 12–14 | 31–33 |
| X-Large | 16–18 | 33½–36 |
What's In Your Legging
Feel
Buttery soft, moderate compression
Wear
Gym, running, yoga, HIIT, cycling
Fabric
Advanced performance fiber
Technology
CiCLO® biodegradable
Tested
Third party verified
Built to move with you — and tested to prove it. CiCLO® advanced fibers delivers the compression and recovery you expect, independently verified free of BPA, PFAS and 50+ other chemicals most activewear brands don't test for. Performance you can feel. Safety you can verify.
Independently tested by a third party lab. Every finished product. Results available upon request. Learn more about our fabric →
Overall rating: 5.0 / 5 from 29 reviews.
The Trimline 5" Biker Short offers a soft, supportive fabric with a high-rise fit that moves naturally with your body. Customers appreciate its comfort and flattering silhouette, making it ideal for any training.
Review topics: ["fit","length","fabric","shorts","material","feel","waistband","clothing","pair","wear"].
"Want a perfect pair of workout shorts for summer? These are a must! The fabrics so silky smooth. The waist band is not like the leggings, it’s a bit more flexible and there is an internal pocket- big enough for your phone or keys. They are super comfortable but also has the right about of compression to keep you held in and comfortable!"
"I love these shorts. They fit well, the quality is great, and no forever chemicals! They are true to size, I ordered a medium and they fit perfectly. For reference I’m 5’4”, 146 lbs, 28” waist."
"I love my tank, gym shorts, and sports bra. They are so soft and comfortable. Unlike a lot of other clean clothing brands, the material is thin and easy to move in."
"Love these. Fit great. I sized up to a small because it was a little too tight on my endometriosis belly but I think for most people it would fit true to size. Love to have found a non-toxic and still good looking short/legging option!"
"I am obsessed! I love the fabric and the waistband! I’m face I wish your leggings had the same waistband. Can you make this in 7/8v?"
"These are literally the best biker shorts ever. I love the waistband and the length is perfect. They have enough elasticity are fitted to the body without being tight. Huge fan!"
"Love the material and the feel . It’s not too loose or constricting . Perfect for Pilates and yoga"
"I wear these for hot yoga and hot Pilates. They fit very well and are comfortable to sweat in. I can tell they will hold up for a long time."
"I’ve been on the hunt for a good pair of biker shorts and always feels kind of awkward in them. These Definite Article shorts are perfection. Enough compression at the top without being constrictive and not too tight around the thighs. Buttery soft and I can’t wait to workout in them."
"These are my new go to shorts! I have worked out, ran errands, cleaned, and lounged in them! They are comfy and stay in place! I love them! I will definitely be buying more pairs!"
