Purposely designed & tested for winter snow sports, the SKINS S400 Extra Warm Men’s Long Sleeve Top with Zip Mock Neck features scientifically proven engineered gradient compression to increase blood flow & oxygen supply, & to re-circulate blood lactate faster. Targeted support stabilises your muscles which in turn reduces fatigue & risk of injury allowing you to fly down the mountain with ease.SKINS thermal fabric is a blend of Polyamind & Elastane, which combines high pulling & abrasion resistance with excellent breath-ability & a soft feel against your skin. The brushed interior helps to release heat back to your body to give you a thermal advantage in cooler temperatures. In addition, the stretch air flow mesh under the arms for increased ventilation & breathability. Now you have the perfect top to accompany you on the slopes