These slippers fit and feel exactly like every other 'real' Birkenstock since 1774.The Italian made wool may feel a bit scratchy or tight on the first wear however, it adjusts and conforms to the foot quickly. Wearing a thin sock can help cut that adjustment period. Being wool, it's water-repellant/water-proof (which also applies to coffee/tea for the half-awake in the kitchen type people who tend to spill their morning cup).The inner sole lining is REAL fur (from New Zealand) , not synthetic. It feels wonderful and nicely fills in any gaps not supported by the Birkie footbed - assuming that the wearer puts it on properly. It is not overly warm ( a plus for those with sweaty feet) yet does a great job at keeping cold feet comfortable.The latex sole is very supportive and flexible. It does not slip on smooth floors and is Lego-proof. The cork footbed provides solid support, not the pillow-like squish that goes flat in a couple of days. Yes, they can be worn outside (but shopping or long walks should be done in street shoes, not slippers).Another big plus is that they are not overly large, cushy, or otherwise oddly shaped so as to look like marshmallows on the feet, don't make walking difficult, don't prevent 'tucking a leg', don't get stuck under cabinets/furniture. Well cared for, like all other Birkie's, there's no reason to think these slippers will not last for many years.Pros: Everything above.Con: Red was Out of Stock in my size.