Seipel Marine 15' Inflatable Boat Bumper - Grey [M4015]15' Inflatable Boat Bumper Grey The Seipel Marine Boat Bumper line works great to protect your boat from scratches dents and dings during boat tie ups & lake parties. It also will protect you when pulling up to or mooring at the dock. Bumpers can be hung off the side of the boat or the side of the dock. You can leave the bumpers hanging all day so you don't have to worry whether you stopped to grab some lunch or just to pick up more friends & grab