It’s a high repulsion mattress with more resilience than a low repulsion mattress and sufficient toughness. The mattress perfectly adapts to the body shape and applies no excessive loads to the back, so it is said to be suitable for those suffering from lower back pain or shoulder pain, or those who tend to lie down on their side during sleep. In Japan, it became a hot-selling item because of the fact that the athletes who joined the Vancouver Olympics were the users of this mattress.