ExOfficio's Modern Collection Underwear embodies sleek, smooth comfort and style with dynamic technical performance for all your travel needs. Super soft nylon stretch fabric regulates perspiration in response to body temperature to keep you cool and dry. Sheer mesh stripe side panels provide breathability and a flattering line. Super soft & comfortable nylon stretch fabric with HeiQ. Adaptive finish dynamically adapts to body heat and prevents odor. Sheer stripe mesh side panels for better breathability and more flattering fit. Bonded waist and leg openings to provide a line-free look that is universally flattering. Fabric: 3.24 oz.yd., 79% Nylon21% Lycra Spandex, Elastic Jersey. Quick drying. Moisture wicking. Breathable. Lightweight, stretch construction. Odor resistant. For hiking, backpacking, and travel. Machine washable. Imported.