The silentnight isla 1000 pocket memory mattress has 1000 independent pocket springs which respond to your bodys contours to provide responsive contoured support generous layers of soft fillings for added comfort with an additional deep layer of body moulding memory foam for ultimate pressure relief modern micro quilted mattress with luxurious soft knitted lid with anti allergy and anti microbial properties it makes a good mattress choice if you suffer from allergies easy care mattress