If you or someone you love has pressure sores on the buttocks, or is at high risk of developing them, choosing the right cushion is one of the most important steps you can take. Not all cushions provide the same level of protection. This guide explains which types genuinely work for pressure sore prevention and management, and what to look for before you buy.
- Why the buttocks is the highest-risk site
- Which cushion types work best
- What to look for when choosing
Why the Buttocks Is the Highest-Risk Site for Pressure Sores
The buttocks and the area around the tailbone (the sacrum and coccyx) are the most common sites for pressure injuries in people who sit for extended periods. The reason is straightforward. When you sit, the bony prominences in this area, the ischial tuberosities or sit bones, concentrate a large share of your body weight into a small surface area. When that pressure goes unrelieved for too long, blood supply to the skin is reduced and tissue breakdown begins.
Who is most at risk
You are at higher risk if you:
- Sit for four or more hours without regularly shifting your weight
- Use a wheelchair daily
- Have reduced sensation in the lower body (due to stroke, spinal injury, diabetes, or Parkinson's disease)
- Have fragile or dry skin, or a history of pressure injuries
- Are an older Australian with limited mobility
The good news is that the right cushion, combined with regular repositioning, can make a real difference to your risk.
Which Cushion Types Work Best for Pressure Sores on the Buttocks
Not every cushion provides enough pressure redistribution to protect at-risk skin. Here is an honest look at each type.
Gel cushions: a strong mid-range option
Gel cushions combine a silicone gel layer with a foam base. The gel allows your body weight to sink into the cushion, distributing pressure across a larger surface area. They are OT-recommended for moderate-risk users and work well for people who sit for extended periods in an armchair, recliner, or wheelchair.
Gel-foam hybrids such as the ETAC Star range are widely recommended by occupational therapists and are a solid choice for anyone with a history of pressure sores or a moderate clinical risk. Browse our gel pressure cushions.
Air cell cushions: the gold standard for high-risk users
Air cushions offer the highest level of pressure redistribution available in a non-powered cushion. They work by allowing the sit bones to sink into air-filled cells, removing direct pressure on the bony prominences entirely. ROHO-style air cushions are the most widely recognised option in Australia and are frequently prescribed by OTs for wheelchair users and people with active or healing pressure injuries.
For Stage 1 to Stage 2 pressure injuries on the buttocks, an air cushion is almost always the recommended choice. Browse our air cushions.
Why basic foam usually is not enough
A standard foam cushion from a pharmacy provides comfort, but not clinical-grade pressure redistribution. It may be fine for low-risk users who sit for short periods. For anyone with existing sores, a history of pressure injuries, or who sits for four or more hours a day, foam alone does not provide enough immersion and envelopment to protect the skin.
This does not mean foam has no role. Convoluted or contoured foam cushions can provide useful support as part of a broader positioning plan. But for the buttocks specifically, gel or air gives you meaningfully better protection.
What to Look for When Choosing
Beyond the cushion type, here are the specific features that matter most for pressure sore management.
Immersion and envelopment
Immersion is how much your body sinks into the cushion. Envelopment is how well the cushion moulds around your body's contours. The more of both, the better the pressure distribution. Gel and air cushions both score well here. Standard foam does not.
Skin microclimate management
Heat and moisture trapped under the body can worsen pressure injuries by softening the skin. Look for cushions with breathable, moisture-wicking covers. Many clinical-grade cushions include a vapour-permeable cover as standard.
A note on stages 3 and 4
For pressure sores at Stage 3 (full-thickness skin loss) or Stage 4 (involving muscle or bone), a cushion alone is not sufficient management. We recommend speaking with a wound nurse or occupational therapist before purchasing. They will advise on the right cushion type and whether additional interventions are needed. A cushion chosen without that guidance may not be the right fit for a complex wound.
Key takeaways
- Gel cushions are a strong choice for moderate-risk users with a history of pressure sores on the buttocks
- Air cushions (ROHO-style) offer the highest protection and are recommended for high-risk or active injury situations
- Basic foam from a pharmacy is generally not sufficient for anyone with existing or recurring buttock pressure sores
- For Stage 3 or 4 injuries, speak with a health professional before choosing a cushion