Our lightest, thinnest base layer. Stretchy and forgiving, its also the most formfitting base layer around. It can be used with the UnDShurt to make a two layer core warmth piece, or used on its own as a minimalist piece. For cycling and running it is a truly versatile top. The UnDLite isextremely quick drying with superior vapor transport to make the perfect undershirt for high temperature conditions. Composition: 56% RepreveR Polyester, 25% RepreveR Nylon, 10% Spandex, 9% flat poly. Sizing: Small 33 35, Medium 36 38, Large 39 41, Extra Large 42 46!