Silk Waterfall Miracoil has an anti-slip incorporated into the spring system. It comes with layers of natural latex fillings, including a top quality cotton fabric serving as its cover, thus providing added luxury features. 

Miracoil runs through the mattress and helps in evenly distributing   weight across the sleep surface eliminating sleep disturbance when your partner rolls to his or her comfortable side.

The mattress is also built with extra springs for a more firmer support system.

Via MattressOnline