I like Haflinger slippers because they have a little arch support inside, although it's not the extra-good arch and metatarsal support I became accustomed to from wearing handmade Steigmann and Giesswein slippers from Austria, but in both those brands they have lowered the support for arches (WHY?!) so now the German Haflinger brand is the same good but a bit too low arch support as all the other slipper brands I've found from Europe. (I have extremely high arches, so if yours are not, you won't notice anything I'm talking about when you wear the slippers; for you they will be perfect! :)Haflingers are most definitely eons better than any slippers Americans have ever come up with! These slippers help care for the bone structure of feet and allow for natural movement while keeps bones relatively neutral.They are 100% wool, even the soles (but with rubber dots added to the soles for grip) so they breathe naturally while keeping feet from overheating yet warm and cozy to increase blood flow. If you want to wear thick socks with them in winter, I would go up a size.They do stretch a bit as all wool does, but then shrinks up a bit if you wash them. I wear a men's 8, women's 10, and European 41 which is a perfect fit for me in all European brands (because their sizing is very exact unlike American sizes). Europeans do not distinguish between male and females sizes; they are the same for both, and these slippers are made for both women and men; there is no difference in the slippers.I have wide feet, between 'H' and 'K' width, or even an 'I' in European winter boots, and these slippers are just fine in the width because they do stretch and conform to your feet. these slippers are an 'H' width out of the box... that's one width wider than 'G' the normal 'medium' most common width, though they don't discuss width, they are definitely 'H' width; I've had four pairs of these style of Haflingers so far, along with three pairs of their clogs which run one width size more narrow: Haflinger clogs are a 'G' width 'medium' out of the box, but slippers are an 'H' width. I hope that info helps out the wide-feet folks!