The best summer sandal imho: the Chaco Zong.
Easy to slip into and kick off, toe loop for great hold and maneuverability, built of rugged materials so long-lasting, fully adjustable continuous webbing for perfect fit, and nice bright color.
Getting ready to replace the pair I’ve had for a long time – ah, the memories. :)
(Bonus material: You can ReChaco your sandals for repairs/adjustments, and also follow these care tips.)