Very strong, My husband uses them for indoor shoes, we had a hard time finding them this time of year. He was happy with it and I would definitely buy it again
Pros
INCREDIBLE FOOT POSITION: You can even wear them with socks for extra comfort. No matter how you flaunt our sandals, you can walk in them all day without feeling the slightest pain in your feet. Walk confidently in our stylish sandals without fear of sore muscles that can result from wearing cheap sandals that don't offer enough arch support.