PERFECT SIZE FOR PELOTON BIKES: It's precisely tailored for Peloton Bike and Bike+, and Nordictrack S22i. It also can be used to prevent other exercise bikes from water and dust. WATERPROOF: The cover is made from waterproof materials 600D oxford on the top and 190T polyester on the sides. The fully seam-sealed design keeps water away and prevents the bikes from erosion under moisture conditions. SECURING STRAPS: The exclusive design (PATENTED DESIGN, US P 17/179,34) of the 4 tie-down straps can tie up the cover onto the bike securely even under windy weather. The bikes will be stored safely and tidily with this great waterproof cover.