UA Base™ 4.0 Extreme Baselayer is our warmest yet, delivering extreme warmth in the extreme cold UA Scent Control Technology to keep you undetected in all pursuits Soft, brushed grid interior traps air, managing your body's microclimate to keep you warm & comfortable Material wicks sweat & dries really fast 4-way stretch material moves better in every direction Performance elastic waistband - Style #: 1343245 Working fly Inseam: 30.5" 81% Polyester/19% Elastarell Imported - Machine wash cold with like colors Use only non-chlorine bleach when needed Tumble dry low Do not iron Do not use softeners Do not dry clean