This Silentnight Mirapocket 1200 combines luxury comfort and tailored support to provide a great night's sleep every night. With Eco Comfort Fibres, this mattress is good for you and good for the environment, as its comfort layer is made from 100% recyclable plastic bottles which offers breathability - due to natural airflow - and enhanced comfort for a more refreshing night's sleep. Silentnight's Mirapocket spring system encases individual pocket springs which respond independently to the weight and offer to zone across the mattress, scientifically proven to provide superior spinal alignment and body support. The mattress is finished with a luxury soft knit cover. It provides a medium firm comfort, meaning it's great for those who switch sleeping positions through the night.