At best, they are suitable for short walks. • Not for people inclined to speculate. I have pain in the arches of my feet after prolonged use. I don't know how people can walk on it. They provide excellent support for people with pronation and flat feet. • No lateral or heel support. Terrible support, I slip out of my shoes with every step. Not for HIIT or excessive lateral movements. • It is not possible to tighten or loosen the laces around the midfoot, but not around the heel as a whole. Shoelaces are not attached to natural textiles. The good thing is they have so much room for your toes! The upper is extremely comfortable and nestles perfectly against the forefoot. I do not recommend them for intensive use.