The Foundation does one thing completely: it takes your tailbone out of the equation. A U-shaped cutout runs all the way through the cushion, so when you sit, your coccyx hangs in open air with zero pressure on it. Your weight redistributes to your sit bones and thighs, letting an inflamed or injured tailbone actually heal.

The contour is engineered to hold you in the right position: a raised front stops you sliding forward, a raised back supports your sit bones, and a gentle centre depression guides your pelvis into place. Dual-density memory foam pairs a firm 45D structure that keeps the cutout open with a soft 35D top for comfort, under a plush velvet cover that zips off to wash.

Non-slip base for any chair, car seat or wheelchair; built-in handle to carry. 45 x 35 cm, 1.1 kg. Made for tailbone pain, BBL and post-surgical recovery, hemorrhoids, and long days at a desk.

Remove the cover via the zipper on the bottom of the cushion. Hand wash the velvet cover in cold water with mild, fragrance-free detergent—velvet fabric requires gentle care to maintain its plush texture and prevent matting. Do not machine wash, as agitation can damage the velvet pile and cause it to lose its softness. Gently squeeze out excess water (do not wring or twist) and air dry flat in a well-ventilated area. Do not tumble dry or expose to direct sunlight, which can fade the black color and damage the velvet. Brush the velvet gently with a soft-bristled brush after drying to restore its plush texture. Wash the cover every 2-3 weeks for optimal hygiene, or more frequently if you use the cushion daily or sweat heavily. The dual-density memory foam core should never be washed; if it gets wet, blot with a towel and air dry completely in a well-ventilated area before replacing the cover. Spot clean the foam with a damp cloth and mild soap if necessary. To maintain the cushion's contoured shape and cutout integrity, avoid compressing or folding it for extended periods—store flat when not in use. The firm 45D foam is durable and maintains its shape under normal use, but excessive compression can cause deformation over time. If the cushion develops an odor, remove the cover and air out the foam core for 24-48 hours in a well-ventilated area (avoid direct sunlight). The foam may have a slight odor when new; air it out for 24-48 hours before first use. The non-slip rubber base can be wiped clean with a damp cloth—do not use harsh chemicals or solvents, which can degrade the rubber. If the rubber loses grip over time, wipe it with a damp cloth to remove dust and oils, which can reduce traction.

Core: Dual-density memory foam engineered for tailbone pressure elimination and structural support. The outer structure uses firm 45D memory foam that maintains the contoured shape and U-shaped cutout under body weight (typically 40-60kg of sitting weight). This firmness is critical—if the foam were softer, it would compress and the cutout would close, allowing the tailbone to contact the cushion and defeating the purpose. The firm foam keeps the cutout open, ensuring the tailbone remains suspended in air with zero pressure. The top surface (2cm thick) uses medium 35D memory foam that's softer and more comfortable against your body—this provides cushioning for your sit bones and thighs while the firmer base handles the structural support. CertiPUR-US certified (free from harmful chemicals, heavy metals, and formaldehyde).

U-Shaped Cutout: The defining feature of the Foundation™. The cutout is 12cm long x 8cm wide x 10cm deep—precisely sized to accommodate the tailbone (coccyx) and surrounding soft tissue without contact. The U-shape opens toward the back of the cushion, allowing easy positioning and ensuring the tailbone sits within the cutout when you sit down. The cutout extends all the way through the cushion (not just a surface indentation)—this ensures complete suspension and zero pressure. When you sit on the Foundation™, your tailbone hangs in the air within the cutout, experiencing no contact with any surface. Your body weight is redistributed entirely to your sit bones (ischial tuberosities) and thighs, which are anatomically designed to bear sitting weight. This pressure elimination is immediate and complete—people with acute tailbone pain often experience instant relief when they sit on the Foundation™.

Contoured Shape: The cushion's contoured design is engineered for optimal weight distribution and postural support. The front section is raised (8cm high) to support your thighs and prevent your body from sliding forward—this is important because the cutout in the back could cause you to shift backward without the raised front. The back section is raised (10cm high) to support your sit bones and provide a stable base. The center has a gradual depression that guides your body into the correct sitting position, ensuring your tailbone aligns with the cutout. The contoured shape also promotes neutral pelvic tilt—when you sit on the Foundation™, your pelvis is positioned in a neutral alignment (not tilted forward or backward), which reduces lower back strain and improves overall sitting posture.

Cover: Plush black velvet fabric that's soft, breathable, and durable. Velvet has a luxurious feel and provides excellent comfort against your body and clothing. The fabric has a slight stretch that allows it to conform to your body shape, enhancing comfort. The black color is practical (doesn't show stains or discoloration) and professional (suitable for office, home, or car use). The velvet is breathable enough to prevent overheating during prolonged sitting. The cover is removable via a zipper on the bottom, making it easy to wash. The zipper is hidden and doesn't interfere with sitting comfort.

Non-Slip Base: The bottom of the cushion features a non-slip rubber base that prevents sliding on chairs, car seats, or wheelchairs. The rubber has a textured pattern that grips surfaces effectively. This is important because the cushion's contoured shape and cutout could cause it to shift during sitting without the non-slip base. The rubber is durable and maintains its grip through repeated use.