Marmot AirExchange UPF 50 Crew Short Sleeve -Men's Birch Bark Medium. AirExchange performance fabric is breathable and quick-drying keeping you in your comfort zone as you power forward. When the sun pops out and outer layers come off UPF 50 protection keeps you safe from blazing rays. Dropped shoulders and abrasion-resistant seams keep you comfy agile and chafe-free under the weight of your pack or racking sling-even on days that start early and end late. Need to snag a snack or lip balm on the move? A side-panel zip-secure pocket stays within reach even when you're buckled into a harness or your backpack's hip belt. Designed to be your trusted trail and alpine baselayer this airy crewneck also keeps you cool and burn-free on sunny beach boat and bike days. Specifications for Marmot AirExchange UPF 50 Crew Short Sleeve - Men's: Manufacturer: Marmot Sleeve Length: Short Sleeve Age Group: Adults Apparel Fit: Regular Gender: Male Package Contents: Marmot AirExchange UPF 50 Crew Short Sleeve -Men's Marmot 195115381561: AirExchange UPF 50 Crew Short Sleeve -Men's Birch Bark Medium