Icebreaker Men's 200 Oasis Leggings w/Fly A best-selling active baselayer bottoms made with our ultra-comfortable 100% merino jersey fabric and an updated design for improved comfort, the 200 Oasis Leggings w/ Fly are the perfect foundation for your everyday cold-weather layering system. Oasis fabric is not only insulating and highly breathable, but it resists odors during extended use. The slim fit and gusseted construction provide unrestricted freedom of movement, while the brushed elastic waistband and flatlock seams throughout eliminate chafing when you're on the move. FABRIC WEIGHT: 200 Lightweight FABRIC: 100% Merino Wool PRODUCT WEIGHT: Medium = 210 g / 7.4 oz