Since 1983, OS SYSTEMS has been manufacturing drysuits for all diving and surface water applications, including military, commercial, recreational, and search and rescue. OS SYSTEMS has made over 85,000 full-body drysuits, as well as thousands of drytops and waders. We have used that technology to bring you this high-quality and affordable line of waders. Non-breathable waders are generally tougher and more durable. Breathable waders transport moisture out through the fabric and keep the user more comfortable.