Description + The men's Burton Lightweight X Base Layer Crew is made with Lightweight 100 Living Lining® that provides consistent temperature regulation without adding bulk or weight so it's perfect for all four seasons. You stay dry, warm, and stoked all day, and since it's lightweight, you get versatile warmth that works all season. This shirt comes stocked with added features including, four-way Stretch 360° for mobility, bluesign® approved non-biocidal finishes keep odors at bay, and chafe-free seams for a friction-free ride. burton lightweight x base layer crew - men's