A perfect core companion for cooler activity, the Woolies 150 Racerback is made from our not-too-heavy, not-too-light, rib-knit Merino fabric. Layer it for your morning run when summer isn't quite in swing or bring it on a through hike journey for days of odor-resistant warmth and comfort. Length from top of shoulder=24 1/2'' (size M). Racerback design. Weight: 3.84.