Not an inflatable but a 98% closed-cell inner foam core that will never blow-out or sink - even bullet holes will not materially affect its function! Encased in an outer covering of "Elastomic Skin" (up to 5/16" thick material, some reinforced with nylon mesh) plus a urethane skin base, the Jim Buoy Giant Marine Fenders are extremely resilient and able to flex with the rigors of high energy berthing over and over again, providing the user with extended service under all conditions.
The West Advisor
The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.