Great shoe for construction but wearers of invisible socks should buy ankle socks or avoid these shoes. The back of the shoe is very stiff and after an hour of running I started blistering in the Achilles tendon area and bleeding on the fabric. Came off easily in the wash but be aware that these are very durable shoes for intense HIIT workouts you can use them for with a downside if you wear socks that aren't going to be flaunted. I bought socks and now I love the shoes.