88% Polyester, 12% Spandex Imported Elastic closure Machine Wash & Hand Wash (Suggest using wash bag) 【 Flatlock Stitching】 Our Long sleeve compression shirt for men using fourneedle six line stitch which can increase durability and prevent chafing. 【 Stretch-mesh Underarm】Men's compression shirts deliver strategic ventilation and helps to drain sweat, always staying dry and breathable. 【Moisture-Wicking Material】Our compression shirts for men are made of 88% polyester and 12% spandex ,this material releases heat and wicks moisture,help you enjoy cool summer and warm winter. 【Stretchy & Durable】The thermal underwear shirts can provide extra 4-way stretch and compression to offer full mobility. Thermal shirts use its strong seams won’t tear prematurely so you can move freely while at home,outdoor and indoor gym activities,office work, or another performance. 【Design for all sports】Our long sleeve compression shirts are suitable for sports,workout,fishing,exercise,undershirts,golf,running, football,bike,basketball,hiking,baseball,Squat,Weight training,hunting,boating,rash guard,soccer,gym,base layer. Show more