I have always sworn by Teva for a summer-sandal—unswayed by the popular Chacos—but I'm tempted by the Merrell Heather Sandals. The air cushion, Lycra neoprene uppers, and QForm soles make them comfortable, durable, light, and great arch supporters. As a bonus, they come in a variety of chic colors. Available at Schnee’s and Sundance Shoes. $75, merrell.com.