The Icebreaker Women's Oasis Long Sleeve Half Zip is one of the most versatile baselayers in our collection. Made from our super-soft, breathable 200gm merino jersey fabric, Oasis keeps you warm in cool weather, breathes well in warm conditions, and only becomes softer with age. Features: Fabric weight: 200 Lightweight Fabric: 100% Merino wool Product Weight: Medium = 200 g / 7.05 oz Zip neck collar for temperature regulation, set-in sleeves, off shoulder seams prevent pack rub, flatlock seams prevent chafing, drop tail hem for added coverage, Icebreaker Merino heat transfer logo