The KoverRoos® Storage Bag Cover bag cover is the ultimate in furniture protection. Outdoor furniture covers need to breathe so that moisture can escape, keeping mold and mildew from developing under the cover. Koverroos® use technologically advanced materials that are one-way breathable - so moisture can evaporate right through the fabric, but water, dust and dirt can't get in. This means our covers are easy to use - no struggling to get them on and off. Also, these patio furniture covers are able to handle temperatures from -100 degrees Fahrenheit up to +240 degrees. The Weathermax™ Storage Bag Cover is appropriate for most weather conditions.This particular cover comes with a velcro attachment system in order to secure the cover in harsher weather conditions and is fitted for an storage bag less than 49" L x 19" W x 23" H.