Under Armour Tech Mesh Boxerjock vs IcedBallz

The Short Version

Under Armour Tech Mesh Boxerjockis one of the most popular athletic underwear options on the planet. Built from polyester/elastane mesh, it's designed for maximum airflow, sweat-wicking, and comfort during intense physical activity. Available at Dick's Sporting Goods, Macy's, and UA.com for $20–$35 per pair (or 3-packs around $50–$70).

IcedBallz is sauna-specific underwear with a built-in pocket that holds an anatomically shaped ice pack. You freeze the pack, slide it in, and get 45–60 minutes of genuine, active cooling — even at 95°C sauna temperatures. $69, ice pack included.

Under Armour dominates the gym. IcedBallz dominates the sauna. Here's why that distinction matters.

What Under Armour Tech Mesh Gets Right

Under Armour didn't become a $5B brand by accident. The Tech Mesh Boxerjock is genuinely excellent at what it's designed for:

• ✓All-over mesh construction — maximum airflow and ventilation
• ✓Performance moisture-wicking — UA's signature sweat management
• ✓Anti-odor technology — prevents bacterial growth during heavy use
• ✓Four-way stretch — full range of motion for any sport
• ✓Wide availability — sold everywhere, easy to replace, affordable
• ✓Proven durability — holds up to hundreds of wash cycles

For running, weightlifting, CrossFit, basketball — any sport where you're sweating at normal temperatures — Tech Mesh is a top-tier choice. The mesh works because the air around you is cooler than your body, so airflow actually provides a cooling effect.

Why Mesh Backfires in a Sauna

Here's what happens to each “cooling” feature at sauna temperatures:

• ✗Mesh ventilation: At 90°C, air is hotter than your skin — mesh accelerates heating, not cooling
• ✗Moisture-wicking: Sweat can't evaporate in saturated sauna air — wicking has nothing to work with
• ✗Polyester/elastane blend: Synthetic fibers absorb and retain more heat than natural cotton
• ✗Anti-odor tech: Chemical coatings on synthetic fabric may leach at 80°C+ against open pores
• ✗No active cooling element: Zero temperature reduction — nothing cold touches your body

In a gym, UA Tech Mesh is elite. In a sauna, you need something that's actually cold — and that means an ice pack.

Under Armour Tech Mesh vs IcedBallz — Head to Head

Synthetic Fabric at Sauna Temperatures

There's a growing conversation in the sauna community about synthetic fabrics. When polyester and elastane are heated to 80°C+, some experts express concern about chemical leaching — especially when your pores are open and you're sweating heavily.

Under Armour's anti-odor technology is great at the gym. But at sauna temperatures, some sauna enthusiasts prefer to avoid synthetic fabrics entirely and opt for natural fibers like 100% cotton.

IcedBallz uses 100% cotton — no synthetic blends, no chemical coatings, no concerns about what's touching your skin at 90°C.

Fertility Protection: Mesh vs Active Cooling

Studies show regular sauna use can temporarily reduce sperm count by up to 50%. Bryan Johnson's Blueprint Protocol includes testicular cooling during heat exposure as a deliberate health practice.

Mesh underwear provides zero temperature reduction for your testicles in a sauna. The air flowing through the mesh is the same 90°C as the rest of the sauna. An ice pack provides a direct, measurable temperature difference — the only thing that actually protects fertility during heat exposure.

If you're a regular sauna user concerned about reproductive health, this isn't a luxury — it's a health decision.

Honest Take: Different Tools for Different Jobs

We have massive respect for Under Armour. They make some of the best athletic apparel in the world. The Tech Mesh Boxerjock is a legit performance product — if you need gym underwear, it's hard to do better.

But Under Armour built Tech Mesh for the basketball court, not the sauna. And it shows. Every “cooling” feature assumes the air around you is cooler than your body. In a sauna, that assumption is completely backwards.

Our honest recommendation:Wear Under Armour to the gym. Switch to IcedBallz for the sauna. They're both the best at what they do — they just do completely different things.