FeaturesSlow rebound and soft memory foam provides support for your hip, leg and tailbone.Ergonomic curves reduce hip pressure without fatigue after long periods of sitting.Breathable hollow center keeps your intimate area cool, relieves lower back pain.Helps correct your posture for long-lasting comfort, can be used as a car seat, desk chair cushion and more.Measures 17.3*16.1*3", suitable for hemorrhoid patients, pregnant women, post-operative care, etc.Specification:Color: Black/Dark grey(Optional)Material: Memory foamSize: 44*41*7.5cm/17.3*16.1*3"Note:Please allow 1-3cm (0.4-1.18") difference due to manual measurement.Package List:1x donut pillow for tailbone pain