Smartwool Classic All-Season Merino Bottom Base Layer - Men's Black 2XL. With an updated fit to improve functionality while enhancing aesthetics these bottoms stay durable while 100percent Merino next to skin keeps you comfy and ready for more action. This gear is built for four seasons of adventure. Specifications for Smartwool Classic All-Season Merino Bottom Base Layer - Men's: Manufacturer: Smartwool Gender: Male Age Group: Adults Color: Black Fabric/Material: 88percent Merino Wool/12percent Nylon Features of Smartwool Classic All-Season Merino Bottom Base Layer - Men's Our lightweight Merino jersey fabric uses a recycled nylon core while still keeping 100percent Merino wool next to skin Package Contents: Smartwool Classic All-Season Merino Bottom Base Layer - Men's Smartwool SW0169580011XXL000: Classic All-Season Merino Bottom Base Layer - Men's Black 2XL