 Sidemount divers who conduct penetration diving in tight environments will generally prefer a flexible fabric backplate, or webbing harness only, which is considered less likely to get stuck in a small restriction than a rigid backplate.An example of a commercial backplate and wing harness adapter, including integrated butt plate and attachment points for bungee loops, is the OMS Profile.Specialized sidemount harnesses are available 'off-the-shelf' commercially.