This classic dark blue, all-around 100% recycled polyester baselayer. The smooth, soft face makes for easy layering. Hollow-core yarns and a diamond-grid back trap warm air, wick moisture and dry fast. HeiQ® Pure odor control keeps things fresh. Made in a Fair Trade Certified™ factory. This item is very gently used with no holes or stains and will be shipped with care from a smoke free and pet free environment.