Mattress Technology: Hand-nested calico pocket spring construction Springs diameter: 54mm 1,326 springs in 150 x 200cm size (5ft x 6ft 6in) Mattress Upholstery: Exclusive natural fillings: Platinum Certified British fleece wool, hand-teased Platinum Certified Devonshire fleece wool, Platinum Certified British fleece wool Finest quality ticking Hand tufted with felt washers Mattress Borders: Upholstered with protective wool 2 rows of hand side-stitching Horizontal handles Air vents Depth: 21cm