Sticky Bags feature super strong, long life suction cups to hold them securely to any clean, smooth surface. Each cup is rated at 8lbs of holding power. These bags are made of UV resistant polyportex to stand up to years of abuse in the harsh marine environment of sun and salt water. Use them to store sheet bags or to hold fishing gear, line or small fenders. You can permanently mount Sticky Bags by removing the suction cups and replacing them with screws (not included).