The rubber on the back of the F1s appears thicker than the Treks. I wear 8 or 8 1/2 depending on the brand and type shoe. saucony omni mens I really love them. The rack was very easy to put together with no problem. saucony omni mens I have been looking for a shoe in this style for a couple of months. saucony omni mens Super comfy ! The reason for the three stars is because the key hole came out on two sides of the bars. Great because they are also waterproof. saucony omni mens Seul bémol: n’est pas didponible au Canada à part sur Amazon So I ordered a pair for my inside wear (inside the house, like "scuffies" for inside the house).
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