Under-Mattress Sheet Holder Plastic Corner Brackets
Four-pack of plastic corner brackets that slide between the mattress and the bed base to anchor a fitted sheet at each corner. The image shows the white plastic frames positioned at the corner of an upholstered bed with the mattress resting on top. Each bracket has a perforated decorative pattern in the side wall, which keeps it light, and a low-profile shape that does not show above the base. Designed for fitted sheets on standard rectangular mattresses where the corners pull free during the night.
- Corner Anchor Design: Bracket sits between mattress and base to hold fitted sheet corners flat.
- 4-Pack Set: One bracket per mattress corner — full coverage in a single order.
- ABS Plastic Build: Lightweight moulded plastic with a perforated decorative side wall.
- Low-Profile Shape: Stays hidden between mattress and base once the bed is remade.
- Standard Mattress Fit: Suits typical UK rectangular mattresses on slatted or platform bases.
A flat-stay sheet at each corner
Slim ABS frame
Each bracket is moulded from ABS plastic with a perforated decorative side wall that keeps it light. The low-profile shape stays hidden once the mattress is back in place, so the bed reads as normal from across the room.
Where it earns its place
Best for fitted sheets that pull free overnight, particularly on memory-foam or pillowtop mattresses where the corner depth varies under load. Works on most standard UK rectangular mattresses; check that your bed base allows a slim insert between the mattress and the frame before ordering.
What is included
Fitted sheets pull free at the corners as the mattress shifts during the night. This 4-pack of plastic corner brackets sits between the mattress and the bed base, so each corner of the sheet has a structural anchor rather than relying on elastic alone. The image shows the white brackets positioned at the corner of an upholstered double bed.
