From moisture-wicking thongs that stay put during workouts to bikinis and boyshorts comfy enough for everyday wear, these are the best cotton underwear for women, according to our team. TL;DR: After more than three years of testing, our top pick remains this six-pack from Amazon Essentials—they’re affordable, durable, soft, and available in inclusive sizing up to 6X. Courtesy of brand Amazon Essentials Cotton Bikini Underwear (6-Pack) $10 Amazon