Features of the Smartwool Women's Merino Sport Tank Dress Lightweight, quick-dry, recycled stretch-woven fabric made to enhance ease of movement Merino sport 150 panels add breathability, enhance thermoregulation, and dry quickly Exposed zipper at back Fabric Details 86% Recycled Polyester, 14% Elastane Trim: 56% Merino Wool, 44% Polyester