The uppers are very breathable and slightly stretchy, but not too constricting. 5 but if you use "thick socks" go up a half size. cream colored af1 I needed the one that sticks in the tiny hole, it doesnt clip on. Head heavy is a plus . cream colored af1 The boom itself can slide to balance the bike over the center vertical support. cream colored af1 The frame on my Schwinn bike bought in1989 is only 16 inches, and I was afraid the racks bars would be too broad apart. Lack of additional driversPrice $140(if you get it for $99, Get it! I am only giving this a 4 because there are some tiny air bubble marks that can be seen, which bothers me because Im a perfectionist and I need everything to look 100% perfect. cream colored af1 I just like a new pair every year. I recommend this product
cream colored af1