Outdoor Research Men's Size Chart Using 83% merino wool with a touch of nylon and spandex for extra mobility, the Alpine Onset Boxer Brief features a trim fit as your next-to-skin layer for easy layering and efficient temperature control. A flat seam construction prevents chafing, and a lightweight, compact design makes it easy to pack. Plus, merino wool naturally blocks odors - making it an easy winner that both you and your tentmate will appreciate. Features: - Quick-Drying - Wicking - Breathable - Lightweight - Mulesing Free - Anti-Odor - Functional Fly - Contrast Stitching - Flat Seam Construction - Low-Profile Non Roll Elastic Waist - Gusseted Crotch - Fabric: 83% merino wool 12% nylon 5% spandex - Inseam: 6.5" / 17 cm - Weight: 2.8oz / 79g Avg weight for size L