Cal-June Yellow Horseshoe Buoy This yellow horseshoe buoy is constructed of tough, vinyl coated material with a closed-cell plastic core making it rot and mildew resistant. The stainless steel hardware throughout the buoy along with a heavy duty zipper makes for a long lasting durable piece of safety equipment that is perfect for any boat trip. Features Tough, Vinyl Coated Nylon Cover Heavy Duty Zipper Closed-Cell Plastic Core Rot and Mildew Resistant Stainless Steel Hardware Throughout USCG App