Coirfit's LUXURINO Bonnell Spring Mattress is an ultimate sleep solution to help you wake up refreshed in the mornings. The Mattress Features Include: Fine Steel Reinforcement Spring:Hard,rust-resistant,non-fading,non-deformation.The Right Firmness:The medium firm mattress features even levels of body contouring and push-back, or hug,without feeling too soft or too hard. Those with back pain generally sleep better on medium firm beds, and side sleepers often prefer medium firmness to help with spine alignment and to provide adequate cushioning that can prevent their shoulders and hips from feeling over pressure.This mattress is designed to provide adequate support to all kind of sleepers.Recommended For: Any Sleep Position.