A Good Example Is The Chuanke Kayak Cockpit Cover Uv60 420D Oxford Adjustable 1.Made of 100% 420D oxford with PVC coating,Enhanced dust-proof and waterproof effect.(420D could easily withstanding damaging weather elements which can last much longer than other seat cover made of 210T,210D,300D. ) 2.Spring clasp can adjust tightness.Added a new buckle webbing to prevent wind blowing. 3.Convenient storage, can be folded into pocket size. 4.Double stitches and UV60+ to prevent tearing. 5.Please measure the outside of your cockpit before your purchase,Move up to the next size if your measurement falls on maximum length and width. CAUTION?pls measure include(around the outside of the cockpit lip length and width)