2 straps for 2 ways wearing: One of the straps is adjustable, could be back strap when you twist the button. The advantage of having a back strap is that when you are running or wearing socks, the clogs won't fall off.
No Arch Support: Sorry we don't have arch support. We choose memory foam(soft) insole with cork footbed(breathable), and eva(light) buttom, not hard arch support cork footbed type.
Attention: It may be a little difficult to twist the strap in the first few times. Please hold the strap with button and twist them together.