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! Often referred to in the industry as the "hull saver", Jim Buoy's unique design is not simply a roll of foam but is a carefully crafted, quality product incorporating the same U.S. Coast Guard Approved foam used in the Jim-Buoy Industrial Life Preservers. The end product is a rugged fender that provides "stop-gap" compression when hard hit time after time; not only protecting the ship from damage but the dock and even the fender itself!
