Package Contents: HADOR Reflective Window Insulation kit has everything you need. It includes a 24 inch x 10 foot insulation foil, suitable for most windows. It comes with 65 small round hook and loop adhesive pads to ensure a secure fit, along with a roll of heavy duty aluminum foil tape for extra strong fixation. All Season Comfort Maintenance: Our reflective insulation board, with a foam core between double aluminum foil, offers great thermal insulation. It effectively blocks the sun's rays in summer, keeps out the sweltering heat, and in winter, it prevents heat loss, ensuring your home stays cozy and warm. Durable Quality: HADOR RV window insulation has a three layer structure, with aluminum foil on both sides and 3mm polyethylene foamed cotton in the middle.