Obermeyer Transport Tech Top - Boys': The Transport is the ultimate performance first layer. With ultra-soft moisture-wicking fabrication, and flat seaming for maximum comfort, this piece is one you'll want to live in. A mock neck style, and reflective zipper and taping will keep you comfortable, but also safe. Fabric & Insulation 92% Polyester, 8% Elastane Knit Product Technologies State of the art performance where you go, whatever the conditions. 1/2 zip - The 1/2 zip offers the extra ease of putting on an overhead garment as well as added option to unzip the garment for additional cooling and comfort. Interior Windguard - Interior windguards ensure that the elements do not penetrate the closed zipper teeth and send a chill to your chest. Obermeyer has learned that when the weather is nasty and a fully zipped up front zipper is tucked under your chin, there's nothing better than the top of the windguard having fleece to minimize abrasion on your chin, especially in cold weather." Product Features Everything you would need to be warm dry and comfortable. From weatherproof features to convenient adjustability to accommodating your accessories and valuables. Flat seaming for maximum comfort Mock neck