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Terramar Geo Fleece underwear is made using a dual surface knitting system which incorporates high-loft grid channels for enhanced breathability. Geo Fleece is an essential layering piece for cold weather protection that offers versatility to cover a variety of activities. Terramar?s Geo micro-fleece is their warmest temperature control layer providing total freedom of movement while adding warmth without causing overheating.Expedition weight, low bulk fabric is 95% micro-polyester/5% spandex.EC2 Qwik-Dri process for maximum moisture transport, quick drying, and exceptional warmth.Fabric is lightweight and extremely breathable.Flatlock seam construction for comfort and durability.Covered elastic waist.Antimicrobial odor controlUPF rating of 50+Avg. wt. 5.2 oz.Import.