Skins A200 Men's Thermal Long Sleeve Compression Top with Zip Mock Neck 85% Nylon/15% Spandex Imported Advanced Thermal Compression fabric perfect for all cold weather activities, especially snow sports Engineered Gradient Compression for improved circulation: Perform longer and stronger with less fatigue and reduced post activity soreness Targeted muscle support for reduced fatigue and risk of injury Fabric contains advanced wicking technology to keep you dry and comfortable Also available in a round neck or mock neck without zipper style