This is no ordinary cushion! This is a technically-superior cushion, which provides your body with long-term comfort on hard wooden or plastic chairs, and unforgiving car seats. Soft gel, sandwiched between two regular foam layers absorbs your body weight, cradling your spine, coccyx and thighs, and supporting your body. Machine-washable, reversible cover provides Sherpa fleece warmth in winter, cooling breathability in summer. H8 x W46 x D35cm.