The SIXS Underlayer Long Sleeve with Collar 4 Season, crafted by Sixs, is an exceptional piece of functional wear that ensures unparalleled body temperature regulation in all conditions. Made from advanced carbon fiber materials, this underlayer offers superior moisture-wicking capabilities and anti-static properties, making it ideal for various off-road activities. The nearly seamless construction reduces friction, enhancing comfort for prolonged use. Additionally, its antibacterial fibers help prevent odor, and it provides a high level of UV protection with a UPF 50+ rating. Whether you're engaging in intense sports or simply braving the outdoors, this underlayer is designed to keep you at your best all year round.