By the end of a long sit, your tailbone has taken the full weight of your body against a hard chair, and that is exactly the ache the Throne removes. A precision U-shaped coccyx cutout suspends your tailbone in open air, so there is zero direct pressure on it; your weight shifts onto your sit bones and thighs where it belongs.

A gentle rear elevation tilts your pelvis forward into its natural position, so you stop slouching and your lower back keeps its lumbar curve without you thinking about it. Dual-density memory foam holds the shape all day: a firm 50D core for structure, a softer 40D top for comfort.

The non-slip base grips any office chair, car seat, dining chair or wheelchair, and a built-in handle makes it portable. Removable, washable cover. 17 x 14 x 3 in, 0.9 kg. Made for coccydynia, tailbone injuries, postpartum pain, and anyone sitting six-plus hours a day.

Remove the cover via the zipper on the bottom. Machine wash the cover in cold water on a gentle cycle using mild, fragrance-free detergent. Air dry flat or tumble dry on low heat. The dual-density memory foam core should never be washed; spot clean only with a damp cloth and mild soap if necessary. Allow the core to air out monthly by removing the cover and placing in a well-ventilated area (avoid direct sunlight, which can degrade the foam). For optimal hygiene, wash the cover every 2-3 weeks, especially if using daily in an office or car. The non-slip rubber base can be wiped clean with a damp cloth—do not submerge in water. Store in a cool, dry place when not in use. The cushion may have a slight foam odor when new; air it out for 24-48 hours before first use. Do not fold or compress the cushion for extended periods, as this can affect the contoured shape and coccyx cutout structure. If the cushion loses its shape or support over time (typically after 2-3 years of daily use), it should be replaced—flattened foam won't provide adequate coccyx relief or posture support.

Core: Dual-density memory foam engineered for coccyx relief and posture support. The sit bone support areas use firm 50D memory foam that maintains shape under body weight and distributes pressure evenly across the ischial tuberosities—prevents pressure concentration that causes discomfort during extended sitting. The front edge uses medium 40D memory foam that's slightly softer to prevent pressure on the backs of the thighs, which can restrict circulation. CertiPUR-US certified (free from harmful chemicals, heavy metals, and formaldehyde).

Coccyx Cutout: Precision-engineered U-shaped cutout (4 inches wide, 5 inches deep) that completely suspends the tailbone, eliminating all direct pressure on the coccyx. The cutout dimensions are optimized based on anatomical research to accommodate 95% of body types while maintaining the cushion's structural integrity. The edges of the cutout are smooth and rounded to prevent pressure points.

Contoured Design: The rear of the cushion is elevated 1 inch higher than the front, creating a subtle forward tilt (approximately 5-7 degrees) that rotates the pelvis into the correct position. This tilt maintains the spine's natural lumbar curve and prevents slouching—proper posture reduces lower back pain and improves breathing and circulation. The contoured shape also features raised side edges that provide lateral support, keeping you centered on the cushion.

Non-Slip Base: Rubber base with textured grip pattern prevents the cushion from sliding on smooth chair surfaces (leather, vinyl, plastic, wood). The rubber is durable and won't leave marks on chair upholstery. Works on all chair types—office chairs, car seats, dining chairs, wheelchairs.

Cover: Soft, breathable fabric that's comfortable against skin and clothing. Zipper closure on the bottom for easy removal and washing. Charcoal grey color matches CalmEden brand aesthetic and hides minor stains. Built-in handle on the side for easy portability—carry between office, car, and home.