AIRCAST: Tube Stretch Sock (Replacement Sock for AirCast Boots)

From the DJO Website: 

"Create a barrier between walker boot and skin to decrease friction, absorb sweat and improve comfort.

Ideal for: Use with the Aircast® walking braces."

A stretchy, soft sock to wear underneath your AirCast Boot. 20" Length

Sold as a single sock, not a pair.