Memory Foam Seat Cushion with U Shaped Rear Cutout

The chair is not the problem. Six hours on the same flat pan is the problem.

This is a single moulded pad, 48 cm across the front, 39 cm deep and 14 cm at its thickest point, and it weighs about 750 g. The top face is a coloured panel that dips into a shallow well where you sit, and the whole rim is wrapped in a light grey bird eye polyester, the honeycomb weave with a visible open cell that sits under most office chair covers.

Two things are cut into it rather than printed on it. The rear edge carries a deep U shaped notch that runs right through the pad, so the back of the seat is open rather than solid. Two small oval ports pass through the front section on either side. A zip runs along one side so the cover comes off the foam entirely.

Key Benefits

• U shaped cutout through the rear edge A real opening cut through the full thickness of the pad, not a moulded dimple, so it lifts the weight off your tailbone as you sit. You can see daylight through it.
• Two open ports through the front section Small ovals cut through the pad on either side of the well, part of the same open construction as the rear notch.
• Memory foam, stated twice by the maker Both the overview and the specification block name memory foam for the core, so it moulds to you and cushions a hard seat, one of the rare imports where those two lines agree.
• Bird eye polyester cover on a side zip The honeycomb weave wraps the rim and the base. Unzip along the side and the cover comes off the foam for washing.
• 750 g, 48 by 39 by 14 cm Light enough to move between a desk chair and a car seat, deep enough to change the shape of a flat pan.
• Three flat colours Black, Dark gray and Navy blue, all solid with no print, each over the same light grey rim.

Best for: a desk chair whose seat pan is flat and hard, a car with a long commute in it, or a dining chair pressed into service as a work seat when the spare room became an office.

Why It Works

Two features are doing the visible work, and both are built into the pad rather than printed on it. The first is the moulded well, which cradles you and stops you sliding forward on a flat pan. The second is the cutting: a U notch through the back edge lifts the weight off your tailbone and two ports through the front mean the pad is not a solid block of foam. Together they are why long hours on a hard seat feel softer and better supported, and it is all construction you can check with your own eyes on the photographs.

Quick Product Facts: Moulded seat cushion; 48 cm wide by 39 cm deep by 14 cm high; weight 750 g; core memory foam per the maker; outer cover bird eye polyester, removable on a side zip; U shaped cutout through the rear edge; two oval ports through the front section; colours Black, Dark gray and Navy blue, all solid; ships compressed in a 26 by 15 by 13 cm pack; packing list is one seat cushion in its compression pack.

How It Fits Your Routine

It comes out of the compression pack flat and unpromising. Leave it on the chair overnight and it takes its moulded shape back by morning. Set it with the U notch at the rear edge of the seat, not the front, and the well will land where it was designed to.

Across a working week it stays put on most fabric seat pans without any strap. On a slippery leather chair or a car seat it will want repositioning once or twice a day until the cover and the seat learn each other. It moves between the two easily since nothing is fixed to either.

For upkeep, unzip the side and pull the cover off every few weeks. Wash the cover on its own and let the foam air flat while it dries, out of direct sun. Spot clean the foam core only and keep it out of water.

FAQ

Is the cutout at the back a real hole? Yes. The U notch passes through the full thickness of the pad and the two ovals at the front do the same. They are cut, not embossed.

Does the cover come off? Yes, on a zip that runs along one side. The cover is the bird eye polyester; the core is the moulded foam and stays out of the machine.

Is it comfortable for long sittings? Yes. The memory foam moulds to you and the moulded well cradles the seat, while the rear cutout keeps the weight off your tailbone, so a hard chair feels softer through a long day at the desk or a long drive.

What size chair does it fit? It measures 48 cm across and 39 cm deep. Measure your seat pan before ordering; on a narrow dining chair it will overhang at the sides, which most people find fine but is worth knowing.