The Icebreaker Women's 200 Zone Seamless LS Crewe is a base layer top for Technical, fast moving pursuits. Cold weather, High altitude, and a whole lot of motion means layering up so you can remain comfortable along the way. The merino wool, nylon and elastane blend is soft and stretchy, designed to regulate temperature with a combination of support and breathability zones. Features of the Icebreaker Women's 200 Zone Seamless Long Sleeve Crewe Seamless construction for ease of wear and mobility Lycra content for stretch and mobility Recycled nylon content for durability Seamless zoned body mapping Technology for optimal thermal regulation and enhanced ventilation Flatlock seams prevent chafing Raglan sleeve construction for mobility Fabric Details 61% Merino, 36% Recycled Nylon, 3% Lycra