54″ length (including 11″ knee pad) x 56″ width Can be used with Basecamp, or anywhere extra cushion is needed. Auto-inflates in seconds. Folds compactly and fits in storage bag (included). Air Pad is the ultimate ground cushion for adding comfort to any rest stop, for Basecamp and beyond. Air Pad self-inflates, has an extra large valve and is custom-fit to sit perfectly under the base of Basecamp for safe use with little ones. A built-in knee pad makes for comfortable in-out. When done, simply roll it up to deflate and store. Attaches to Cruiser for hands-free transport.