J.L. Matthews Bucket Covers are designed to fit a wide variety of bucket sizes and shapes. All bucket covers are made of heavy-weight vinyl coated nylon. Heavy-weight vinyl nylon is waterproof, oil, gas, and tear-resistant and designed to reduce wind whip. All bucket covers have an elastic shock cord sewn into the hem. The Bucket Covers are also offered with Foam between two layers of heavy-weight vinyl that has been heat-sealed. This creates a dome effect over the bucket to allow maximum water run-off. All covers are offered with a choice of 4 lanyards with swivel snap to further secure the cover.