Our popular Classic All-Season Merino Base Layer 1/4 Zip is the perfect base layer for warm or cold weather. This top uses our All-Season-weight Merino fabric wrapped around a nylon core to increase durability, while still keeping the 100% soft, Merino wool you love next to skin. Side seams help minimize chafing while wearing a pack and offer a body-enhancing fit. This base layer is comfortable, powerful, sustainable, and, frankly, do-it-all-able. Features Fit: Slim Our slim fit is intended to follow the contours of the body Our lightweight Merino jersey fabric uses a recycled nylon core while still keeping 100% Merino wool next to skin Flatlock seam construction and offset shoulder and side seams designed to help increase comfort and minimize chafing Side seams wrap to front Size medium center-front zipper: 8" (20 cm) Made in China: 88% Wool-Merino, 12% Nylon. Exclusive of Decoration. SW002819 Care Machine Wash Warm Gentle Cycle Wash With Like Colors Do Not Bleach Tumble Dry Low Cool Iron As Needed Do Not Iron Decoration Do Not Dry Clean