The Stillwater II Rubber Cleated sole wading shoe is constructed of durable 1000 denier non-shrinking nylon, with LSG (Locking Stud Grip) outsole with recessed stud attachment points, losing your steel wading studs is a thing of the past. Designed to be worn with a 3.5mm or 4mm neoprene booties there is no need to go up a size with the Stillwater II. Can be worn with or without .