Suitable for camping, hiking, snowboarding, backpacking, climbing and more, the pullover top features the Wear's thinnest and most breathable inner layer fabric available from Mountain Hard Wear. It's a perfect base layer for both cool summer high country activities and three-season lowland outings. The special VisaEndurance treatment works with embedded silver fibers to help eliminate odors and facilitate moisture transfer. A deep front zipper provides additional venting and allows for easy removal.