Columbia Mens Heavyweight II Long Sleeve Top Elastane^Polyester Machine Wash Columbia Men's Size Chart You're in the big leagues now. Beef up your cold-weather training kit with the Heavyweight II baselayer for performance layering. Performance Fit is a body-mapped design, contoured to move with you. Omni-Heat&trade; reflective lining:&#8226; Metallic lining reflects body-generated heat for improved warmth retention.&#8226; Backing dissipates excess heat.&#8226; Membrane comprises 65% of lining for high breathability. Omni-Wick&trade; fabric:&#8226; Moisture-wicking fabric moves perspiration away from the skin to dry quickly on the surface.&#8226; Four-way stretch for improved range of motion. Crew neck. Long raglan sleeves. Droptail hemline. 85% polyester, 15% elastane. Machine wash and tumble dry. Imported. Measurements: Length: 31 in Product measurements were taken using size MD. Please note that measurements may vary by size.