Smartwool Classic All-Season Merino Base Layer Crew - Women's Nightfall Blue Medium. This base layer features Core Spun technologywhich is Merino wrapped around a nylon core for added durability while still keeping the comfort of ultra-soft responsibly sourced Merino next to skin. Our Raglan sleeves eliminate shoulder seams for perfect comfort under a pack and smooth merrow stitching wraps from side to front to keep you looking as good as you feel. Specifications for Smartwool Classic All-Season Merino Base Layer Crew - Women's: Manufacturer: Smartwool Sleeve Length: Long Sleeve Age Group: Adults Apparel Fit: Slim Gender: Female Application: Outdoor Fabric/Material: 88percent Merino Wool/12percent Nylon Features of Smartwool Classic All-Season Merino Base Layer Crew - Women's Our slim fit is intended to follow the contours of the body Our lightweight Merino jersey fabric uses a recycled nylon core to increase durability while still keeping 100percent Merino wool next to skin Merrow stretch stitching designed to elevate comfort range of motion and fit Side seams wrap to front for body-enhancing fit Raglan sleeve design eliminates need for shoulder seams Package Contents: Smartwool Classic All-Season Merino Base Layer Crew - Women's Smartwool SW016912P43100M000: Classic All-Season Merino Base Layer Crew - Women's Nightfall Blue Medium