K R Super Cushion 3 Flat Dock Bumper The KR Super Cushion Flat Dock Bumper is a great way to protect your boat and your dock from bumps and bruises from the docking process. Oftentimes when a boat is being docked weather and or water conditions can cause the boat to rub against or be jolted into the dock. Bumpers help absorb the impact and help prevent costly repairs from damage during this process. Flat dock bumpers can accommodate a variety of applications and attach easily in a variety of di