This is a Smartwool Merino Sport 250 Long Sleeve 1/4 Zip in Black & Gray. Excellent used condition. No flaws. Size M Measurements taken lying flat. Armpit to armpit- 21in Length- 27in Main body- 56% merino wool & 44% polyester Side panel/Underarm- 54% merino wool & 46% polyester Zip up and head out this winter with a layer that provides warmth, comfort, and the power to perform: our Men's Merino Sport 250 Long Sleeve 1/4 Zip. Our warmest Merino/poly blend will help move sweat away from skin as you heat up, drying quickly and holding its shape no matter how sweaty you get during your workouts. For even more breathability, we've added gender-specific, body-mapped panels of mesh fabrics. Minimal Merrow seam construction provides superior durability while keeping super-soft material against your skin, and thumb loops provide a secure fit. This Smartwool-Æ base layer will help keep you comfortable so you can conquer more. • Athletic Fit • Minimal merrow seam construction provides superior durability while keeping material soft against skin • Integrated thumbhole openings for additional coverage and reflective elements for added visibility in low light conditions