Eggcrate Foam Invalid Ring Cushion 15x17x4 Inch 1.5 Density Pressure Relief

Extended time seated or in bed creates concentrated pressure on the coccyx and surrounding bony prominences — pressure that, over time, can lead to significant discomfort and skin breakdown. The Eggcrate Foam Invalid Ring Cushion addresses this with a convoluted foam ring design that distributes weight evenly across the seating surface and relieves direct pressure on the coccyx and tailbone. The 1.5 foam density provides comfortable, supportive cushioning for extended use, and the 15" x 17" x 4" dimensions accommodate most standard chairs and wheelchairs. Cushion only — no cover included.

Key Features

• Convoluted eggcrate foam — distributes weight evenly and reduces pressure on bony prominences
• Ring design — relieves direct pressure on the coccyx and tailbone during seated use
• 1.5 foam density — comfortable, supportive cushioning for extended wear
• Cushion only — no cover included

Specifications

• SKU: 1985
• Dimensions: 15" x 17" x 4"
• Foam Density: 1.5
• Material: Convoluted (eggcrate) foam
• Includes: Cushion only (no cover)

Ideal For

• Pressure ulcer prevention for patients who spend extended time seated in a wheelchair or chair
• Coccyx and tailbone pressure relief for individuals with pain or sensitivity in the sacral area
• Bedridden patients who need a ring cushion for repositioning and pressure redistribution
• Home health, nursing home, and long-term care settings requiring a cost-effective pressure relief cushion
• Post-surgical recovery where direct pressure on the coccyx or perineal area must be avoided during seated activity

Frequently Asked Questions

What is an invalid ring cushion and how does it differ from a standard seat cushion?
An invalid ring cushion has a central opening or void in the middle of the cushion, which means the user's coccyx and perineal area are suspended over the opening rather than resting on a solid surface. This eliminates direct contact pressure on the most vulnerable bony prominences in the seated position. A standard flat or contoured seat cushion distributes pressure across the entire seating surface but does not eliminate contact at the coccyx. Ring cushions are specifically designed for users who need to avoid any direct pressure on the tailbone or perineal area.

What does eggcrate (convoluted) foam do that flat foam does not?
Eggcrate foam has a convoluted surface with peaks and valleys that allow the foam to compress unevenly under the body's weight. This means pressure is distributed across a larger surface area compared to flat foam, which compresses uniformly and can create higher localized pressure at bony prominences. The convoluted structure also allows air to circulate more freely through the foam, which can help reduce heat and moisture buildup during extended use — both of which are contributing factors to skin breakdown.

Does this cushion come with a cover?
No. This listing is for the cushion only — no cover is included. For clinical and home care use, a washable or waterproof cover is strongly recommended to protect the foam from moisture, bodily fluids, and contamination, and to make the cushion easier to clean between uses. Covers are available separately and should be selected to fit the 15" x 17" dimensions of this cushion.

How long does eggcrate foam last before it needs to be replaced?
Eggcrate foam will gradually compress and lose its pressure-redistributing properties over time with regular use. The lifespan depends on the user's weight, frequency of use, and how well the foam is protected from moisture. In general, eggcrate foam cushions used daily should be inspected regularly for signs of permanent compression, flattening of the peaks, or deterioration of the foam structure. When the foam no longer returns to its original shape after use, it should be replaced to maintain effective pressure relief.