Clark's cloudstepper thong sandals in black. I wore these once. I liked that they had the velcro side strap to adjust the top but I have never worn flip-flops bc I've always hated the feel of the thong between my toes. I thought I'd give these a try bc of all the arch support they offer and all that "fulcrum point" tech or what have you, but I still cannot get over the feeling of anything between my toes. These were $40 originally. See pics.