Thank you for viewing. I purchased this for travel in September 2025. I brought it on a trip, but I didn't have a chance to use it, so it's unused. 〈Product Description〉 Brand Name: ROCACOCO Product Name: Lumbar Air Cushion Color: Gray Material: Cover - Front: Cotton, Back: Polyester; Cushion Fabric: TPU + Polyester Size: When expanded: Bottom length 42cm * Top width 33cm * Height 39cm When stored: Length 17cm * Width 12cm * Thickness 5cm Weight: Approximately 215g Features: 【Air Cushion with Cover】This lumbar air cushion is designed based on ergonomics and comes with a washable 100% cotton cover. 【Adjustable Strap, Palm-Sized Storage】It has an adjustable strap to secure it to the seat, preventing slippage, and can be used both indoors and outdoors. 【Two-Stage Air Valve】The amount of air can be adjusted with the valve knob, allowing for customization to your preference. Please consider this item, understanding that it has been stored at home.