[Premium Memory Foam Seat Cushion] Experience lasting comfort with our high-density memory foam donut cushion. Crafted from slow-rebound memory foam, it maintains its shape over time and provides robust support. Its thermal sensing capability adapts to your body temperature, ensuring personal comfort and a perfect fit. [Ergonomic Design] Designed with your well-being in mind, this cushion features a contoured shape that supports your hips and thighs effectively. The central hollow area alleviates pressure on the coccyx, providing relief from hemorrhoids and postoperative discomfort. The innovative U-shaped groove design minimizes coccyx pressure during extended sitting. [Washable Velvet Pillowcase] Enjoy the soft feel of the plush velvet surface, complemented by a non-slip silicone base to keep the cushion securely in place. The easy-access zipper allows for quick removal and washing of the pillowcase, ensuring convenience and cleanliness. Please avoid leaving the cushion on light-colored leather surfaces for extended periods to prevent staining. [Ideal Cushion] This versatile cushion fits any chair, transforming uncomfortable seating into a soothing experience. It’s perfect for use in various settings, including offices, home dining, or during long car rides. Ideal for gifting on special occasions like birthdays, Christmas, or Mother's Day. [Important Note] For optimal support, we recommend the weight limit for the sciatica relief cushion should not exceed 180 pounds. The non-slip silicone bottom ensures stability, but please avoid prolonged contact with light-colored leather materials to protect against potential staining.