evo.com | Burton Long Underwear Bottoms > The Burton Synthetic Midweight Base Layer Pants is not fancy, just smart. Recycled polyester with a touch of spandex stretch, soft on both sides, and built to regulate temperature instead of just insulating and hoping for the best. Thumbholes, flatlock seams, zero itch, these will keep you feeling dry and stoked all day. Slim Fit Streamlined to skim the body while still allowing for a full range of motion. Sits close to chest, hip, and thigh. Thigh Pocket Left side drop-in thigh pocket adds practical storage. Warmth Rating (1 -5) 1.5 Performance Fit A slim fit with four-way stretch makes for easy layering and an unrestricted feel. 92% Recycled Polyester / 8% Spandex | Burton Synthetic Midweight Base Layer Pants Men's 2027 - X-Large Gray | Spandex/Polyester