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.

Oximeter Probe Wraps
• Holds optical components firmly to help prevent misalignment
• Helps block excess ambient light for more exact readings
• Universal design may be trimmed to fit neonatal foot, infant toe or paediatric finger .