Why does this one say "synthetic sole" while others say felt sole?

Every pair that I have purchased had the felt sole, including the cat. Perhaps they are trying something new?

Lots of "comfortable" reviews, but do they have good arch support?

Very little arch support. I found these slippers to be too wide for my feet and, therefore, dangerously slid around. I worried about tripping down the stairs.

Can I put these in a wash machine?

They are 100% wool. I have never put them in washing machine , actually never thought about doing that--they are wonderful quality. I think a gentle cold water wash may be okay. Air dry of course.

Women's Sassy Slipper

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