An all-season favorite, wear the Merino 150 Long Sleeve as a baselayer in fall or as a single layer when summer backpacking calls. Featuring Core Spun technology, we&';ve wrapped Merino around a nylon core for added durability while still keeping the temperature regulation and moisture management benefits of ultra-soft Merino next to skin. Raglan sleeves remove shoulder seams for comfort under a pack and smooth merrow stitching wraps from side to front for a flattering look.