My husband has tried various other brands of socks ,none of which
remotely resembled the L/XL I chose for him.
He finds Posey socks comfortable and true to advertised sizing.

Posey Horseshoe Wedge Safety Rail
The Posey Horseshoe Wedge is a foam cushion designed to fit around the head or foot of a bed. It features under-mattress flaps and straps for secure placement.
Key Features
• Helps protect patients from entrapment between the mattress and the headboard and/or footboard, and between the mattress and the ends of side rails.
• Sewn-in zippers allow integration of Posey Side Rail Wedges or Bed Bumpers to form expanded bed perimeter coverage.
• Under the mattress, flaps and hook-and-loop straps secure the wedge in place.
• Made of soft foam and covered in wipe-clean vinyl.
• Length: 381mm