Best for: everyday wear, travel, and warm-weather comfort. Our Natural Fiber Thong is built for all-day comfort — soft, breathable modal that transitions easily between travel days, everyday wear, and warmer weather, with no visible lines under clothing. Crafted from premium PFAS- and BPA-free, Oeko-Tex® certified plant-based fabric. Sustainable Comfort: Made with Superfine™ micro-modal, sustainably harvested from beech trees, for an exceptionally soft, breathable feel. Reliable Performance: Moisture-wicking and twice as soft as cotton, keeping you cool and comfortable through everyday activity and travel. Tested by our team across Nordic and alpine skiing, marathon training and racing, racquet sports, golf, team sports and travel, and it also delivers superior performance. Durable Design: The front panel of the thong is double-layered for added comfort and coverage, while the wide waistband prevents rolling and ensures the thong stays in place. Versatile Wear: This thong has been tested and approved by our team doing various sports and it stays in place. It transitions beautifully from any adventure to a night on the town. Note: Our natural fiber underwear runs small. Please size up if you are between sizes.