I have looked and looked all winter, online, but cannot find any that are just right. The criteria, should you wish to help me is
Brown to wear with skirts or wrap dresses
Knee high and casual, so no heels
No fussy whistles and bells and not dressy
If you imagine Fly Mols but don't like the front being higher than the back!
Can't be pull on, must have a zip
Maybe this is why I can't find any! 
Thanks for any inspiration.