as others have mentions, is a bit tight around the ankle area where you slip your foot in, which can be difficult at times, best to use a shoe horn if you don't want to damage the shoe long term. It will stretch out in time however when you wear it more I think adidas thought this would be smart to have a more tighter/water proof area. But forgot that comfort might be compromised The previous generation they tried an outer 'jacket' zipped area over the laces, but this also restricted and made it tight over the top unless you ordered a size up Also I am normally size 11, I had to order size 12 so it isn't too tight. I think size 12.5 is also fine but if it is too loose inside, that wouldn't be great either

If I could I would make this model the only one I wear and different colours too.