The Kokatat Basecore Long Sleeve Shirt is the first layer in delivering comfort when you're out for a paddle. This silk weight baselayer is constructed from a polyester polypropylene Polartec Power Dry material for reliable moisture wicking for the entire life of the garment that won't disappear with washings. And you won't have to wash it that often thanks to the Polartec Power Dry silver treatment that repels unsavory odors. Additionally, its polypropylene knit lining has a low thermal conductivity which means lower heat loss which means you stay warmer and more comfortable during resting periods on the river. Finally, the top's paddling specific patterns allow you to stay mobile through each paddle without rubbing or bunching so you can send it down the river without having to worry about your layers.