Description from website: These midweight polyester baselayer pants are ideal for keeping you warm and dry in cold weather. The face is knit smooth for easy layering while the interior is soft fleece for maximum heat retention. FreeDry® moisture wicking FreeShade® UPF 50 sun protection Odor control tech—stays fresher longer Flat seam construction to reduce bulk and prevent chafing Inseam: 31" Active. An athletic fit. Close to the body without restricting mobility.