Cool Blue Memory Foam to keep mattress cool! 13.5 guage Bonnelle Spring Unit. Mattress arrives vacuum packed and rolled up Quilted Breathable Cover with Breathing Vents 20cm thick Mattress 4ft6 Double : 135cm x 200cm x 20cm We currently only deliver to UK Mainland only, we do not deliver to the following postcodes (BT, KW, IV, JE, HS, PA, ZE AND AB)