If you want to feel comfortable while you are walking, then sling sandals are the best. Some straps are colorful and some are monochromatic.
The colorful straps are elasticized so that you don’t have to go through the struggle of tying. The black base of the shoe and the rainbow straps are a good combination.
The peach strap and the black base make a good sandal. The flat sandals help you walk and run for a long time.
It could be your yoga class or other exercise sessions, when you need flat shoes, take one pair like the following one. The all-black sandal is a good accessory.