pocket spring mattress with vacuum compressed package Material: The coils of the spring are made of high manganese steel.All the pocket springs are individual,and this can minimize the vibration of the mattress. Environmental space cotton make the inner of the mattress to be airpermeability,anti-bacteria and dust mite. High gradefabric surface with the elegant color let it be so popular in the market. Pocket spring As you can see in the picture, the spring net is made of so many individual spring pockets. Everyspring works alone when you sleep on the mattress. It can avoids the noise between the spring pockets friction, and reduces the influence between the spring pockets. Especially for couples, You don't need to worry about waking up your wife or husband any more when you get up at night. Size: KING SIZE:80X76(inch)=203X193(cm)QUEEN SIZE:80X60(inch)=203X152(cm)DOUBLE SIZE:74X54(inch)=188X137(cm)TWIN SIZE:74X39(inch)=188X99(cm)SIZE20GP40GPSINGLE200pcs660pcsDOUBLE160pcs480pcsQUEEN120pcs420pcsKING80pcs360pcsOr you can tell me the size you want,because almost allsizes are available. Packing: Normal package: plastic bag inner,paper bag outside. Compress package:vacuum bag with wooden pallet. Delivery time: within 15days afterreceipt depoisit.(10 days per container).