OS Systems offers two waterproof/non-breathable models, the tough and durable SPLB-SRO, and the economy SPLB-SREC, in 19 standard sizes, plus full custom sizing. In addition, OS can individually design and make your drysuit with the features you choose. Except where specified, all OS waterproof non-breathable SARR Surcace Water Drysuits include (1) Material on SPLB-SREC: 200 denier oxford with a polyeurethane coating for waterproofing. (2) Color for SPLB-SREC: Orange top / Black bottom. (3) Seams: Seams are double stitched for strength and fusion sealed on the inside for water tightness. (4) Design: Designed with Freedom Cut™ features for complete and unrestricted freedom of movement. Sidearm Panel Gussets™ extend all the way from each elbow, down the arm to the waist. The Crotch Gussets™ extends from one ankle through the crotch and all the way down to the opposite ankle for unparalleled fit, function and freedom of movement. (5) Waist: Internal BC Waist™ (Bungie Cord Waist) streamlines the fit and reduces drag. Everything is internal to prevent portentially dangerous snagging. (6) Safety: Reflective tape - The SPLB-SRO has (2) 1" SOLAS, and the SPLB-SREC has (1) 1" SOLAS horizontal strip(s) just above the wrists. (7) Entry: Front diagonal entry wterproof zipper for guarenteed water tightness. (7) Reinforcing: Cordura® Butt Pad and Knee Pads for protection, srength and improved slip control. (8) Seals: LongLife Latex™ neck, wrist, and sock seals. These seals are also easily replaceable. Do not walk in the drysuit socks without protective footwear! (9) Testing: each drysuit is individually tested under pres sur and under water to guarantee water tightness. Warranty: Two Year Limited Warranty. The SPLB-SRO Includes these additonal features: (1) Fabric: 210 denier High Count Nylon base faric provides extraordinary strength to weight. Polyurethane coating provides waterproofing. (2) Color: All Sea Rescue Orange. (3) Overlays: Cordura and Neoprene Wrist Wraps™ and Ankle Wraps™ protect the wrist seals and the latex socks. (4) Model: Shown with optional brass tooth zipper and red/orange reflective tape.