This RV Vent Insulator and Skylight Cover measures 14" by 14" and is 3" thick, fitting perfectly into a standard 14" by 14" vent or skylight space. It has a foam body and removable cover with a soft feel to keep the heat or cold in, lowering your temperature costs and increasing your control over your RVs environment. With this simple piece, you can be more comfortable in your rig, save energy and money on temperature control, and be able to create a stable environment in your RV. Removable outter cover can be machine washed. Soft core .