Popins are women's shoe trees built for travelers, shoe lovers, and anyone who has ever unpacked a pair of heels and winced. Founded by a celebrity stylist who spent over a decade packing footwear for press tours and editorial shoots, Popins solves a problem that used to have exactly one solution: stuffing your shoes with socks and hoping for the best. They weigh three ounces, fit most women's sizes, and pop in and out of any shoe in about two seconds flat. Single pairs, three-packs, and five-packs are available at shoppoppins.com.