TheZerofitHeatrub Ultimate Shirtis a premiumbase layerwith unmatched warmth, heat retention technology, and a stretchy, non-restricting fit.

As the crown jewel of their baselayer collection, the Zerofit Heatrub Ultimate is an award-winning and independently tested baselayer, proven to be five times warmer than similar tops and twice as warm as a sweater without the bulk.

The secret lies in their revolutionary ‘Heat Threads,’ which are woven into the fabric of the shirt and activated with the slightest movement. These threads gently brush against your skin, instantly generating positive warmth without requiring compression or tightness to keep you warm or the need for additional layers on top.

Additionally, as the Heatrub Ultimate doesn’t rely on compression for heat, the shirt is made from a four-way stretch fabricallowing you to move freely without restriction,whilstgenerating and retaining warmth. The shirt features a slightly loose neckline, allowing excess heat to escape and prevent overheating without feeling restrictive.

Tested rigorously at the prestigious Boken Institute, Japan’s leading testing organization, the Heat Retention Rating of 0.78 sets the Heatrub Ultimate far apart from standard baselayers, which typically range from 0.1 to 0.14, and makes the base layer the perfect companion for outdoor activities in the most extreme temperatures.

Machine washable, moisture-wicking and proven to work in temperatures between -10 Celsius – 10 Celsius, the Zerofit HeatrubUltimate does the work of multiple layers which also makes it a cost-effective thermal solution.

Details:

• ‘Heat Threads’ technology generates heat as you move
• Close fit to seal in body heat
• Four-way stretch textile
• Loose neckline
• Machine washable
• Moisture wicking
• 68% Acrylic, 21% Nylon, 21% Polyester, 7% Wool, 2% Polyurethane
• Optimal Temperature Range: -10 Celsius thru 10 Celsius