The Hammerhead TM (patent protected) is an extreme-buoyancy, constant-wear Tactical PFD designed specifically for Special Operations and Tactical Response Units. With 65 lbs (289 N) of buoyancy, the Hammerhead provides the ultimate in protection for carrying tactical weights of 50 lbs or more. Comfortable and light-weight, the PFD does not interfere with tactical vests or ballistic protection. The Hammerhead can be integrated with a YatesTM or similar climbing harness and can accommodate a hydration system. Quick-release hardware enables easy donning and doffing. Actuation can be manual, automatic or depth-sensor. 

US Patent# 7059925, Canada Patent# 2501746