Outdoor Research Men's Alpine Onset Merino 150 Bottoms The Alpine Onset Merino 150 Base Layers feature a newly updated, softer, non-mulesed merino wool blend and UPF 30 sun protection for stretchy, moisture-wicking, breathable warmth that's naturally odor-resistant for extended, multi-day wear between washings. Long Description The Alpine Onset Merino 150 Bottoms are a soft, breathable, moisture-wicking bottom designed for use as part of a strategic layering system for active outdoor wear while skiing, snowboarding, climbing, hiking, and more. Crafted with a non-mulesed merino wool blend, this lightweight, breathable, wicking, and quick-drying base layer ensures comfort while stretching and moving with the body for unrestricted movement and a natural range of motion. The flat-seam construction delivers chafe-free performance, while the elastic logo waistband provides low-profile comfort that perfectly layers under a shell and mid-layers. And when the need arises to strip down to the bare minimum, the UPF 30 rating shields from the sun's UV rays. When layering up for a long day in the mountains or a chilly morning workout, the Alpine Onset Merino 150 Bottoms are the ideal foundation to the perfect layering kit. Fabric 53% Merino Wool, 42% Polyester, 5% Lycra Fabric Performance Non-Mulesed Wool Breathable Wicking Quick Drying Lightweight (150gsm) Naturally Anti-Odor UPF 30 Design Features New Fabric Flat-Seam Construction Elastic Logo Waistband Shaped Functional Fly Gusseted Crotch 9" Leg Opening on Size Medium Fit Next-to-Skin Fit Size Range S-XXXL Product Weight 180 g / 6.35 oz Length 78.7 cm / 31 in New/Best Seller/Updated Updated Sustainability Non-Mulesed Outdoor Research Men's Alpine Onset Merino 150 Bottoms