By strategically mapping optimal base-layer performance, Under Armour developed Basemap 2.5 with varying fabric thicknesses – heavier 3.0 material where you need it and lighter 2.0 where you don’t for superior thermal management. Flatlock stitching and ergonomic seams prevent chafing. Engineered for free movement. ArmourBlock® odor-reducing technology. 93/7 polyester/elastane. Imported. Sizes: S-3XL. Color: Black.