You strain as you can feel your muscles fatiguing. Veins swell up with every effort. Your thirsty and hot. It's hard, hard work.
Arctic Heat Cooling Vests will give you an advantage.
A cooler body means less sweating. Less sweating means more fluid to enable top class performance.
Cooling the body will send that blood back to the muscles where you need it. You're stronger for longer.
With the unique Sportwool inner, any sweat is quickly removed - keep you cool and dry so you can perform at your best.