Why the wealthiest men in the world wear these shorts.
Six reasons the most successful men have made the switch.
Why the wealthiest men in the world wear these shorts.
Six reasons the most successful men have made the switch.
The world's wealthiest men don't wear recycled plastic.
The world's wealthiest men don't wear recycled plastic.
The ultra-wealthy share one habit: they stop tolerating "good enough."
92% of all activewear is made from polyester — a petroleum byproduct chosen because it costs a fraction of natural fibre. Mass-market brands profit. Their customers sweat in plastic.
Merino wool thermoregulates better than any synthetic on earth.
Merino wool thermoregulates better than any synthetic on earth.
Every high-performance sports brand claims to keep you cool. Most achieve it with petroleum-derived synthetics and a large marketing budget. Merino wool does it through millions of years of biological engineering.
Merino Wool maintained significantly lower skin temperatures during sustained exercise compared to synthetic alternatives.
Polyester is poisoning you during every workout.
Polyester is poisoning you during every workout.
When you exercise in polyester shorts, sweat opens your pores and your skin absorbs what's against it, including the microplastics.
A landmark clinical study found polyester exposure caused a measurable decline in testosterone, reduced sperm production, and shrank testicular size in male subjects — with no other lifestyle change.
Nero outperforms every synthetic short in the properties that actually matter.
Nero outperforms every synthetic short in the properties that actually matter.
Fast-fashion gym brands compete on stretch and colourways. The metrics that matter to a man who takes his health seriously are different: odour resistance across multiple wears, moisture management without trapping heat, and zero contribution to systemic inflammation.
Merino wool is naturally anti-microbial. Nero shorts stay fresh through multiple sessions where synthetic shorts need washing after every single use.
Active Merino Liner Short
All-natural athletic shorts designed for movement and built for durability.
Regulates Temperature
All Natural Fabrics
Moisture-Wicking
Soft As Cashmere
New Zealand Merino
Sourced like a Loro Piana suit. Built for the gym.
Sourced like a Loro Piana suit. Built for the gym.
The shell is certified organic cotton. The liner is 100% New Zealand Merino Wool, from farms where animal welfare and fibre quality are the same priority.
This is the same sourcing standard Loro Piana applies to their £3,000 trousers. Nero applies it to your active short.
Nero vs. Polyester
The difference isn't marketing. It's measurable.
100% natural fibres
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Natural odour resistance
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Active thermoregulation
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Zero microplastic shedding
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Fully biodegradable
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Confirmed hormone safe
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Cashmere-like skin feel
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Needs chemical treatment
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Passive thermoregulation only
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700k+ microplastics per wash
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800+ years to break down
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Hormone safety disputed
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Varies — often plastic-feel
Try them for 99 days. If they're not the best shorts you've ever worn, we'll refund every penny.
The confidence we have in this product doesn't come from marketing. It comes from 500+ five-star reviews, repeat customers, and the conviction that once you've trained in 100% natural fabric, going back to polyester is a conscious decision to train in plastic.
We are that confident.
Built from two of nature's finest fibres.
Every material choice was made with one question: is this the best possible option, or are we compromising?
Zero plastic. Zero compromise.
From certified New Zealand merino farms to GOTS-approved Turkish cotton — every fibre is traceable.
What high-performers are saying.
Train in the best. Or keep sweating in plastic.
Nero Active Shorts. 100% organic cotton shell. 100% merino wool liner. Zero synthetics. Zero compromise. Worn by the world's most successful men.
You deserve better than a Coke bottle with a waistband.
