These are recovery sandals. They're recommended for after sports, and also for everyday wear, anytime. I also use them at home. They're easy on tired feet after work, and I love them. Double Flip Flop TELIC Size...S 23cm～23.5cm Color...Teal Blue TELIC After training and activities, release your entire body from the ground up. That's TELIC footwear. These are recovery sandals recommended by Katsuya Kyudo, chairman of Shimokitazawa Hospital, which has been a topic in the media. TELIC sandals, developed with a unique material, are light and fit snugly to your bare feet, wrapping your feet perfectly. These sandals, which even feel like you're wearing air, will support you from your feet in any situation.