Everything You Need to Know

Most underwear is designed flat, trapping heat and moisture around one of the body's most temperature-sensitive areas.

TestiCool™ features a patented 3D pouch engineered to lift, separate, and support - improving airflow and maintaining optimal body temperature.

Our heat-conductive yarns and AirlyCool™ waistband regulate heat, wick moisture, and resist odour naturally.

They're performance fibres blended with natural conductive materials (such as silver or other advanced yarns) that draw heat away from the skin and disperse it evenly.

Unlike chemical coatings, this functionality is built into the fibre itself - permanent, washable, and non-toxic.

Absolutely. It's anatomically mapped to the male form for complete comfort and support.

There are no compression seams or restrictive panels - only smooth, ergonomic shaping that moves with your body.

The conductive yarns naturally inhibit odour-causing bacteria, keeping you fresher for longer.

It's a permanent feature that won't wash out or rely on chemical finishes.

Snug but never tight. The fabric should contour naturally to your body while allowing unrestricted movement.

If you're between sizes, size up for a relaxed fit or stay true to size for a more supportive feel.

No. The underwear features a no-ride-up construction and a leg length designed to stay in place through workouts, travel, or daily wear.

No. The 3D-engineered pouch retains its form thanks to elastic memory fibres and precision knitting.

It won't collapse or stretch over time.

Machine wash cold (30°C) with similar colours.

Use mild detergent, avoid bleach or fabric softeners, and tumble dry low or line dry.

The antimicrobial and heat-conductive properties are built in - they won't wash out.

With proper care, far longer than standard underwear.

The yarns resist pilling, seams are flat lock stitched for strength, and the modal fabric keeps its softness and shape after every wash.

Not necessary. The modal blend is naturally wrinkle resistant.

If needed, use a cool setting only and don't iron on prints.

Micro-modal is a natural, high-performance fibre made from renewable beechwood.

It's incredibly soft, breathable, and produced in a closed-loop system that recycles over 95% of water and solvents.

We chose it because it delivers both comfort and conscience.

Our fabrics and garments are made in family-run factories in Northern Italy, where local production reduces our carbon footprint and maintains exceptional quality.

Yes. All packaging is made from FSC-certified recycled paperboard, printed with vegetable-based inks, and assembled with water-based adhesives.

There's no plastic film, foam, or lamination - only responsible materials that look good and do good.

We ship worldwide, with fulfilment hubs in the UK, EU, USA, Dubai, Canada and Australia.

Shipping costs and times are calculated automatically at checkout.

• UK & EU: 2–5 working days
• Rest of the world: 5–10 working days (depending on customs clearance)

Yes - every order includes a tracking link once dispatched.

For hygiene reasons, underwear can only be returned if unworn and unopened in its original packaging.

If your order is damaged or incorrect, contact our support team within 14 days and we'll sort it right away.

Yes - we selectively license our patented pouch and fabric technology to performance, activewear, and health-focused brands.

Visit our Licensing section or contact us at support@testicool.co.uk for details.

Yes. We're developing new silhouettes and hybrid base layers using next-generation heat-conductive and antimicrobial yarns.

You'll see these evolve across sportswear and recovery wear soon.