Castelli Prosecco Tech Long Sleeve The Castelli Prosecco Tech Long Sleeve was designed to be worn in cold to cool weather as a base layer and under bibtights. The stretchy rib-knit main fabric provides light insulation and has been treated with a hydrophilic coating to wick moisture away from the body. The Prosecco Tech LS T-shirt fits tight and close to the skin for optimal warmth and wicking properties. Prima Loft panels covering the center back and the waist are extra breathable to allow for even insulation when covered by a bibtight. A crew neck was added for a low-profile neck line to fit underneath jerseys. Features Hydrophilic treatment for maximum moisture-wicking Prima Loft panels for even insulation Lightweight 151 grams SPECIFICATIONSMaterial100% polyester Sleeve Length Long Closure Type None Fit Tight Intended Use Road, trail, XCSpecial Features Hydrophilic treatment Sizing Size Small Medium Large Extra Large2X Large3X Large Chest36"37. 5"39"41"43"45"Waist31"33"34. 5"36. 5"38. 5"40. 5" | Castelli | Prosecco Tech Long Sleeve Men's | Size Small In Black | 100% Polyester