Aircast SP (Short Pneumatic) Walker Brace/Walking Boot Replacement Foam Liner with Insole, Large - Walmart.com
Amazon.com: [3 Pack] Impresa Replacement Sock Liner for Aircast Compression Walking Boot or Walker Brace - Breathable Orthopedics Socks for Cast Boot - Walking Boot Socks for Women and Men - One
Amazon.com: Aircast FP Walking Brace-Small : Health & Household
Aircast SP, FP, XP Walker Accessories, Pumps, Liners - DME-Direct