KarrimorSupa 5 Ladies, Women’s Rise Hiking Boots

Would a size 8 be a good fit for someone who wears a Clarks shoes size 7.5uk - 41.5eu?

Are they easy to clean? Can they be machine washed if needed?

Are the soles quite rigid as I need a firm pair of shoes. Thanks

I take a size 5 wide fit shoe should I go up a size