FDX Men's Compression Armour Base Layer Top Long Sleeve Thermal Gym Sports Under Shirt FDX Light weight base layer designed to be worn in all conditions,all year round 4-Way Stretch Fabrication - Allows greater mobility and maintains shape Advanced,high wicking fabric helps you stay dry by transporting sweat away from the body Anti-Odour Technology Prevents the growth of odour causing microbes Flat seam construction helps prevent skin irritation