A request from our ultrarunning ambassadors who asked for a breathable cap—the Duckbill is back in a lightweight SUPPLEX® 100% recycled nylon. Hat folds and packs easily. The brim and front are made of updated Baggies™ fabric; open mesh on rest of cap dissipates heat Foam brim can fold into a pocket and rebound to its original shape Dark underbill reduces glare COOLMAX® fabric headband wicks moisture Adjustable rear buckle with elastic for snug fit Shell: 4.34-oz 2-layer 100% Nylon Goretex with a DWR (durable water repellant) finish. Upper body lining: 2.51-oz Tricot Mesh. Hood lining and under powder skirt: 2.2-oz 100% polyester taffeta. Powder skirt: 3.5-oz 91% recycled polyester and 9% spandex