Best Bed Positioning Bolster UK: Side, Knee and Wedge

By Scott Smith. Last reviewed 23 October 2026.

Which Type of Bed Positioning Bolster Do You Need?

The right bed positioning bolster depends on which part of the body needs support and how the person usually lies. A side positioning bolster is a long roll or wedge placed along the back to help someone stay on their side. A leg positioning bolster or knee positioning bolster sits between or under the knees for comfort and alignment. A wedge positioning bolster raises part of the body at a gentle angle, such as the upper back or legs. A foam positioning bolster for bed use is a general shape that can be used in several positions. If the person is cared for in bed, a nurse or occupational therapist can advise which shapes to use and how often to change position. Before buying, note the positions used most during the day and night, then choose bolsters that support those positions.

How Do These Bed Positioning Bolsters Compare?

The table shows who each bolster suits and the type stated in its listing. Note the positions used most first, then check size and foam.

What Size Bolster Fits a Bed?

A bolster should be long enough to support the area it is used for without hanging off the mattress or crowding the person. Side bolsters often run most of the length of the back, so measure from the shoulder blade to the hip in cm while the person is lying on their side. Knee bolsters need to fit comfortably between the knees, so measure the gap you want to keep. Wedges should match the width of the person’s back or legs. Check the mattress width too, especially on a single or profiling bed, so there is room for the person and the bolster. Compare your measurements with the length, width and height listed for each product. Firmness matters as well; a bolster that is too soft flattens quickly, while one that is very firm can feel hard against the body.

Are Foam Bolsters Better Than Pillows for Positioning?

Foam bolsters hold their shape better than ordinary pillows, which makes them more reliable for keeping someone in one position through the night. Pillows compress, slide and bunch up, so a person may slowly roll back from their side or lose support under the knees. Positioning bolsters are cut to specific shapes, with firm foam that stays in place, and many have covers with a non slip underside. Pillows still have a place for extra comfort, but a purpose made bolster gives more consistent support. When comparing, check the foam type, such as high density or memory foam, and whether the cover is waterproof and removable for washing. A quick test is to press the bolster firmly with your hand: it should spring back quickly rather than staying dented.

How Do You Use Bolsters When Helping Someone Change Position?

Bolsters work best when the person is moved gently into the new position first, then the bolster is placed to hold them there, rather than using the bolster to push them over. If you care for someone in bed, ask a district nurse or occupational therapist to show you safe ways to help them turn, as poor technique can hurt both of you. Once the person is on their side, slide a side bolster along their back, tucking it close so it supports without pushing. Place a knee bolster between the knees and check the ankles are not resting directly on each other. Keep bedding smooth and free of creases under the person. Check skin regularly in areas that take weight, such as hips, heels and shoulders, and tell the care team about any redness that does not fade. Follow the schedule for changing position that the care team suggests, and keep bolsters clean and dry between uses.

Frequently Asked Questions

How Do I Choose the Right Bed Positioning Bolster?

Start with the position the bolster needs to support, then measure the body area and the mattress. Choose a bed positioning bolster in the right shape and size, with firm foam and a removable, washable cover.

Is a Bed Positioning Bolster Available on the NHS?

Positioning bolsters are sometimes supplied through the NHS or community nursing after an assessment. Ask your district nurse, GP or occupational therapist, who can advise on the right shapes.

What Weight Can a Bed Positioning Bolster Hold?

Bolsters do not usually carry a user weight limit like frames, but foam density affects how well they hold up. Check the listing for foam type and any guidance for heavier users.

How Do You Clean a Bed Positioning Bolster?

Remove the cover and wash it as shown on the label, usually on a warm machine cycle. Wipe waterproof covers with a mild disinfectant and let the foam air before refitting.

Can I Claim VAT Relief on a Bed Positioning Bolster?

Disabled people and those with a long term illness can usually buy a bed positioning bolster without VAT if it is for their own personal use. You normally sign a short declaration when ordering.