Breathable mesh material. Purchased in August 2024. I haven't used it much, so it's relatively clean with no stains. I bought it from a shop called China Navi on Rakuten for 6890 yen. I threw away the box and instruction manual, so I can't include them. China Navi Stroller Fan Seat Child Seat Fan Baby Back Sweat Heatstroke Prevention Children Baby Summer Cooling Stroller Seat Ange Smile - Material: Mesh - Size: Standard size - Accessories: With straps Thank you for looking.