Featuring 1400 my pro pocket springs the extra memory comfort 1400 mattress offers superior comfort and support whilst mymini springs shape to your body contours the mattress further features a 30mm top layer of mymemory breathable memory foam and myedge support which prevents roll offthis mattress is nbf approved and comes with a 5 year guaranteeplease note spring count refers to a 5ft kingsize modeldimensionssingle w 92cm x l 192cm x d 335cmsmall double w 122cm x l 192cm x d 335cm