MisolinWomens Slipper Memory Foam Fluffy Slip-on House Suede Fur Lined/Anti-Skid Sole, Indoor & Outdoor

Hello, is it possible to wash these slippers?

The sizing on these slippers are strange, 3.5/5, 5.5/6.5 etc, does anyone know if the 3.5/5 would fit someone with a size 5 foot?

Has anyone had these a long time? Are they long lasting if you wear them every day? Thanks

Do these slippers come boxed?