Don't let the cold stop your winter workouts in this men's ColdGear Armour Compression Mock Longsleeve from Under Armour. Built with dual-layer ColdGear fabric that traps in insulated warmth, UA's Moisture Transport System means drier, more comfortable training system. 4-way stretch fabrication optimises the range of motion for unrestricted, limitless training sessions. Smooth, chafe-free flatlock seams minimise chafing and irritation so you can focus on pushing yourself without distractions, while anti-odour technology puts an end to odour-causing microbes for fresher wear longer.. Material: 87% Polyester/13% Elastane