I have these boots in black and I have to say they are so comfortable, I have worn them all winter. I agree that they are very slim fitting around the calf area but the top buckle can be adjusted slightly.When they have been worn a few times, the tight fitting tends to ease a little and the bonus is they do not go saggy around the leg like some boots do. The soles are very hard wearing and I have not experienced them being too slippery on wet flooring, or at least no more than other footwear. Am definately going to get another pair of Fly boots, really good value for money and very well made.