100% Cotton outer fabric with 4cm thickness hard foam filling. Best mattress topper to reduces your back pain. 4cm Breathable foam, moth-resistant anti-allergen Mattress Topper. The moth-resistant and anti-allergen feature ensure safe use. Made of a premium quality material, Removable & Washable. 4 Corner Elastic Bands to Fit in Bed. Size - 160 x 210 cm.