Adjustable crotch strap Made of durable materials, this crotch strap is adjustable to ensure a secure fit and provides uniform trim and buoyancy characteristics underwater. Enhanced safety By securely fastening the harness and backplate to the body, the crotch strap reduces the risk of the tank hitting the back of the head during dives or while resting at the surface. Lightweight and portable Lightweight and portable, it is convenient to carry and use during scuba diving or diving activities. Multiple sizes available There are crotch straps available in 1', 5', or 2' wide with a D ring, allowing you to find the most secure and comfortable fit. Use scenarios During scuba dives with a backplate harness, helps prevent the tank from striking the back of the head when moving, descending, or resting at the surface. In diving or shallow water dives, maintains a secure fit and stable trim for better maneuverability underwater. While traveling or preparing gear at the dive site, its lightweight and portable design makes packing and deployment easier.