... kg/m³Valve made of ABSElastic bands: Polyester Packaging: Each mat rolled very tight, fixed with integrated elastic bands, then ... packed into transparent polybag (PE) with colour insert sheetInsert sheet 34 x 22 cm, 157g ... Any other questions, pls contact us freely: 188x60x5cm Self-inflating mat,cushion,inflatable bed,PU foam padded,ABS valve,180T polyester