Pillows very hard to the touch (at first), but softens with body heat. Not recommended for people who sleep on their stomachs, for cons on the back and the side is almost perfection !!! (A book regulars ergonomic pillows, the flexibility of the pillow is optimum around a week (for me)) Warning can be as to the size of the pillow (perfect for me Size M 1M70 and 64KG.Bien choose size before purchase very very important) Small problem: PRICE Good buy, to see the longevity of the product !! Delivery and perfect packaging as your orders at AMAZON !! THANKS