Men&';s Burton Synthetic Midweight Base Layer Crew The Men&';s Burton Synthetic Midweight Base Layer Crew is a warm, technical first layer built for comfortable days on the mountain and easy wear afterward. The 230gsm recycled polyester stretch jersey has a slim fit with four-way stretch for unrestricted movement and easy layering. HeiQ Smart Temp(TM) helps regulate body temperature as your activity level changes, while HeiQ Fresh(TM) provides odor control to help keep the shirt feeling fresh. Quick-drying, breathable performance and chafe-free seams make it a dependable choice for long days in your snow gear. Details Material: 92% recycled polyester, 8% spandex Fabric: 230gsm midweight peached jersey Fit: Slim fit designed for performance layering Stretch: Four-way stretch with Stretch 360Adeg for unrestricted mobility Temperature Regulation: HeiQ Smart Temp(TM) technology helps regulate body temperature Odor Control: HeiQ Fresh(TM) silver-free odor-control technology Performance: Quick-drying, highly breathable and moisture-wicking Seams: Chafe-free Softlock seams with double-needle stitching at sleeves and hem Thumbholes: Hidden thumbholes integrated into the seams Features: Woven logo and locker loop Sustainability: BluesignA(R) approved product Warranty: Limited Lifetime Warranty