Sherwood Magnum BCD's: Newly redesigned, Magnum is a jacket style BCD for easy resting on the surface Sherwood's exclusive MiniPac system tightly secures your tank Depth compensating cummerbund for snug fit 3-D aircell means Magnum will not squeeze on inflation Heavy 1000 denier nylon for long wear A durrable and good performing BCD at a reasonable price Size X-Small thru X-Large