Blaze on with the AirExchange UPF Collection. Whether you’re stepping out the door for a day hike, climbing session, or backcountry excursion, throwing on this baselayer should be your first step. AirExchange 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, while the 1/4-zip helps cool you down when the pace or temps heat up. Dropped shoulders and abrasion-resistant flat-felled seams keep you comfy under the weight of your pack, 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 keeps essentials within reach, even when you’re buckled into a harness or your backpack hip belt.