![What is this white, mold-looking, stuff on my shoes? I clean it off with acid or alcohol and it keeps coming back. : r/whatisthisthing What is this white, mold-looking, stuff on my shoes? I clean it off with acid or alcohol and it keeps coming back. : r/whatisthisthing](https://preview.redd.it/wz1sso8fjmz21.jpg?auto=webp&s=efa82128d3c85a0206950c539ed3dbebf2ca152a)
What is this white, mold-looking, stuff on my shoes? I clean it off with acid or alcohol and it keeps coming back. : r/whatisthisthing
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Amazon.com | SOREL Men's Caribou WL Wool Boot — Quarry, Black — Waterproof Leather Snow Boots — Size 7 | Snow Boots
![Sorel Snow Boots-Men's Size 7 Real Wool Liner- Canada- Best Snow Boots - baby & kid stuff - by owner - household sale... Sorel Snow Boots-Men's Size 7 Real Wool Liner- Canada- Best Snow Boots - baby & kid stuff - by owner - household sale...](https://images.craigslist.org/00x0x_lP0mqC004bO_0lM0t2_600x450.jpg)
Sorel Snow Boots-Men's Size 7 Real Wool Liner- Canada- Best Snow Boots - baby & kid stuff - by owner - household sale...
![Amazon.com | SOREL Men's Caribou WL Wool Boot — Quarry, Black — Waterproof Leather Snow Boots — Size 7 | Snow Boots Amazon.com | SOREL Men's Caribou WL Wool Boot — Quarry, Black — Waterproof Leather Snow Boots — Size 7 | Snow Boots](https://m.media-amazon.com/images/I/81MGEv+wB+L._AC_UY300_.jpg)