For hygienic purposes, underwear is nonrefundable. Sorry for being so mean!The Terramar Men's Wind CS Boxer Brief is a brushed polyester spandex boxer brief with an integrated, windproof front panel and four-way stretch. ClimaSense (CS) treatment is designed to respond to your body's changing conditions to keep you comfortable no matter what your activity level. Perfect for under soft shell pants, while skiing or biking, or just when you need a little extra protection where it counts.Constructed of 86% brushed micro polyester, 14% spandex stretch jerseyClimaSense (CS) treatment is designed to respond to your body's changing conditions to keep you comfortable no matter what your activity levelThe CS system adapts to the skin's surface temperature, providing a warming effect when you are cold and a cooling effect when you are active, with a dynamic moisture transport systemClimaSense offers advanced odor control and uses bluesign approved, performance based technologies360Adeg four-way stretch jersey knit construction allows unrestricted movementWon't stretch out or lose elasticityBrushed surface creates additional air-trapping warmth, breathes well, and dries fast to enhance moisture transportAnti-microbial treatment for odor controlFabric provides UPF 25+ sun protection, shielding skin from harmful ultraviolet raysDesigned to meet your performance level; for wear in cold to very cold temperatures with low to medium activityWoven wind-proof panelInseam 3 in.Machine washableImport