Arc'teryx Rho LT Bottom Men's 84% polyester, 16% elastane Imported 2" high 12" wide RHO LT BOTTOM - Constructed from Torrent fleece, the Rho LT is a lightweight thermal baselayer bottom for lower output activities in cool to cold temperatures. ARC'TERYX ESSENTIALS - Versatile high performance designs for diverse activities and conditions. BREATHABLE MATERIAL - Allows moisture vapour to escape, helping regulate temperature and elevating comfort inside garment. LIGHTWEIGHT - High performance, minimalist design that is durable for its weight. RHO - Thermally efficient base layer with excellent moisture management properties. Has stretch comfort.