Aetrex applies its brand of comfort technology to ballet flats.

At first glance they seem more sensible than skyscraping stilettos but doctors have linked the lack of support in ballet flats to a number of overuse injuries, among them heel pain and plantar fasciitis as well as muscle and tendon strain throughout the leg. This spring, Teaneck, NJ-based Aetrex is stepping up to the plate and adding flats infused with comfort to its lineup of wellness footwear.