1. Shrinks Your Balls

In a groundbreaking medical study, polyester caused complete infertility, dramatically reduced sperm production, and visibly shrank testicular size.

2. It’s Cheap and Overused

92% of gym wear uses polyester because it’s cheap to mass-produce. Brands profit while you sweat in recycled plastic bottles, soaking in bacteria and chemicals.

3. Pumps Microplastics into Your Body

Every workout in polyester gym shorts floods your skin and bloodstream with microplastics and chemical toxins. Sweat opens your pores, making absorption easier and health risks higher.

4. Switch to all natural

We’ve eliminated polyester entirely. Nero shorts combine premium Merino wool and organic cotton designed for breathability, odor resistance, and unmatched comfort.

5. Made with Care, Built to Last

Our products are crafted in Turkey, the second-largest producer of organic cotton in the world. We use premium Merino wool sourced from New Zealand. Every detail, from fabric quality to fit and construction, is carefully chosen to ensure unbeatable comfort and performance.

6. Test them out for 99 days

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.

200+ 5 Star Reviews

Shorts for Any Season

  • 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.
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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