Features: Transform your RV, boat, or camper sleeping experience with our premium breathable mattress underlay! Designed specifically for Queen-sized 83" L x 59), this modular underlay ensures optimal air circulation to keep your mattress dry, fresh, even in humid or confined spaces. Specifications: Material: Mattress Underlay: TPE Aluminum Foil Tape: Aluminum Foil Color: Gray/Silver Size: Mattress Underlay: 11.8 x 11.8 inches Aluminum Foil Tape: 1.2 inches x 65.6 feet Package Includes: 35×Mattress Underlay 1 Roll of Aluminum Foil Tape Notes: For manual measurement, please allow slight errors in size. The color may have a slight difference due to different screen displays. ST:breathable mattress underlay queen size board meshfiber under pad cuttable rv modular interlocking ventilation boat camper creating bed air dry flow barrier winter system protection mat car cover skirting accessories couch furniture hypervent