1) The Polyester Fertility Tax
Polyester is an endocrine disruptor. In medical trials, it was shown to reduce sperm production and physically shrink testicular size.
Nero fix: an ultra-fine merino liner that breathes and regulates temperature next to skin.
2) It Smells After One Workout
Polyester holds onto body oils and odor-causing bacteria. It’s why your “freshly washed” shorts can smell suspicious after one session.
Nero fix: merino is naturally odor resistant, it stays fresher, longer.
3. Plastic On Skin, Every Rep
Polyester is plastic fiber. If you’re trying to clean up what you put in your body in 2026, it’s backwards to ignore what you wear on it especially when you’re sweating and warm.
Nero fix: natural fibers only (merino + organic cotton). No synthetics.
4. “Wool Is For Sweaters”
People hear wool and think thick, itchy, and hot. Nero uses superfine merino wool, naturally temperature-regulating, breathable, and soft enough to wear directly on skin.
Nero fix: keeps you cool when it’s hot, warm when it’s cold, built to move.
5. Most Gym Shorts Are Built For Margins
Polyester dominates because it’s cheap, scalable, and brands can print a logo on it and call it “performance.”
Nero fix: Certified GOTS organic cotton from Turkey + superfine merino wool RWS certified sourced from New Zealand.
Bonus: 99-Day Obsession Guarantee
We're so confident you'll love Nero that we offer a 99-Day Money-Back Guarantee. No questions asked. Try them risk-free and feel the difference immediately. Say goodbye to sweaty plastic shorts forever.
Made for all seasons.
- Temperature-Regulating: Stay cool in scorching heat and warm when it’s chilly—no more sweaty plastic clinging to your thighs.
- Naturally Moisture-Wicking: Merino wool quickly absorbs and evaporates sweat, keeping you dry and comfortable throughout the day
- Built for Every Workout: Crafted from unbelievably soft yet durable Merino fibers, our shorts handle intense workouts, weekend hikes, and everything in between.
Nero Merino Liner Short
All-natural athletic shorts designed for movement and built for durability.
All Natural Fabrics
Regulates Temperature
Moisture-Wicking
Soft As Cashmere
New Zealand Merino
“I wish I'd tried them sooner”
99 day money-back guarantee
Don’t absolutely love your Nero Shorts? No Worries - we uphold a 99-Day Money-Back Guaranteed policy. No questions asked.
New zealand merino
Our Merino Wool is sourced and produced in NZ and production is finished locally.
Fast and free shipping
Get free shipping and 3-4 day delivery