The I/O Fleece pant is a under-wader, fleece pant designed to be worn directly under waders when fly fishing. The I/O Pant, from Redington, was engineered specifically for wear under waders and possesses many design elements beneficial to such use. The I/O fleece pant is the good ol' boy in Redington's insulation lineup. Made from 280g non-pilling Redline fleece, these pants offer a fully elastic waist, full zip fly, on-seam side pockets, and a back zip security pocket. Lycra stirrups keep the pants down in your boots and waders for added comfort. A must for chilly weather wading. We offer the Redington I/O Fleece Pant in five sizes: Small - XXL in the black color pictured.