

Comfortable fit: If you hate the feeling of thongs, you’ll still hate them when running.Flat lock seams mean the raw edges were sewn together so the seam’s underside has no extra fabric, which means less irritation. Many brands advertise as seamless, but most use flat lock seams or just fewer seams than usual. Minimal seams or flat lock seams: Thick seams can feel irritating or rub uncomfortably creating blisters.We recommend fabrics such as polyester or nylon.


Moisture-wicking fabrics: Certain fabrics (like cotton) absorb moisture and hold onto sweat, while others will wick it away keeping you dry and comfortable.When shopping for running underwear, here's what our experts recommend: Quality and comfortable lace thongs, bralettes & lingerie, sleepwear and sustainable swimsuits. The Good Housekeeping Institute Textiles Lab tests everything from sneakers to leggings every year, and we used our expertise to find the best running underwear for women. Find a great collection of Socks, Underwear, & Accessories for Women at Costco. Running underwear are made with moisture wicking fabrics (not cotton!) that stay in place without chafing. While you can run in traditional underwear, you risk overheating and chafing, which can be incredibly uncomfortable and can even slow you down during a race. While you love wearing your favorite cotton undies day to day, you’ll regret wearing them running or exercising. Knickey’s organic cotton underwear offers the best of both worlds with a navel-skimming waistline and a high, French-cut leg opening that shows. Runners swear by the the best running shoes, sports bras, and leggings for running - but even if you have the best workout gear, you'll be supremely uncomfortable if you wear the wrong undergarments.
