Simms Rivertek Midweight Pants are the highest quality, most innovative mid-weight layer so far designed for the fisherman. Elastic waist, hidden fly & non-wicking polupropylene stirrups. Simms Rivertek Midweight Pants are manufactured with Polartec fabric technologies Power dry 4-way stretch Multi-fabric construction designed specifically for fly fishing Simms Rivertek Midweight Pants Available in M, L, XL, XXL Size Waist Inseam Medium 31-33' 31' Large 34-36' 32' XLarge 37-39' 33' XXLarge 40-42' 34'