Men's Classic All-Season Merino Base Layer Long Sleeve Camping & Travel/Dog and Pet And the Challenge is all

And  the Challenge is all of those things because they have a Gore-Tex insert  and a Hydrowick micro denier lining

Included Vortex™ pump sack provides easy and fast inflation

Body Fabric: Poly 420D Small Back Stafford

Adjustable snap back

Men's Classic All-Season Merino Base Layer Long Sleeve Camping & Travel/Dog and Pet And the Challenge is allFIT Slim FABRIC WEIGHT 150 g m2 CONTENT 88% Merino Wool, 12% Nylon. Exclusive of Decoration. SIZES S 2XL FEATURES Our slim fit is intended to follow the contours of the body Our lightweight Merino jersey fabric uses a nylon core to increase durability while still keeping 100% Merino wool next to skin Flatlock seam construction and offset shoulder and side seams designed to increase comfort and minimize chafing Side seams wrap to front for body