AT Merino Bottom Base Layer. Dual-face 250-gram construction for warmth, durability, and comfort. Merino wool lining for thermal regulation and moisture control. Polyester exterior for shape retention and pill-resistant performance. Moisture-wicking and breathable for dry, all-day comfort. Natural odor-resistant properties for extended wear. Full seamless construction with crotch gusset for unrestricted mobility. 4 cm elastic waistband with Alpinestars branding. Functional fly opening with ankle-length design.