This patio chair cover is made of heavy duty oxford fabric. All the covers are added PU waterproof coating, which can protect your chair from water seeping and keep your furniture dry.The air vent design helps air circulation to reduce the condensation on your patio chairs and keep the outdoor chair dry.There are two wide padded handles for you to install and remove the cover easily. The outdoor chair cover is designed with four click-close straps and cord-lock closure at bottom to keep the cover attached to the chair legs.Please kindly measure your patio chairs before purchasing.