The flannel worn by guides across the world, Simms' Guide Flannel long-sleeve shirt will keep you warm and toasty on your next fly fishing adventure. The polyester material offers great moisture-wicking properties and UPF 50 sun protection performance. The two chest pockets are large enough to fit fly boxes, and feature a hook and loop closure on one and a zippered closure on the other. Stay on the water longer with the innovations of the Simms Guide Flannel long-sleeve shirt. Stay down collar for convenience Tool pocket on side adds functionality UPF 50 sun protection.