Amazon.com | Wool Felt Replacement Boot Liners: 75% Wool, Navy Blue (826 BB) - Standard Boot (Approx 10” high), Size 7 | Snow Boots
Sorel winter boots bought 31 years ago and they still get regular winter use. I replaced the liners three times over the years and had one rubber fix that I recall. : r/BuyItForLife
Men's Timberland PRO® Pac Max 10" Heavyweight Boot Liner
Amazon.com | Wool Felt Replacement Boot Liners: 75% Wool, Navy Blue (826 BB) - Standard Boot (Approx 10” high), Size 8 | Snow Boots