ASICS® Core Singlet - Women's The ASICS® Core Singlet offers simple running comfort. Made with mesh fabric, this running singlet helps wick sweat away from your skin, keeping you cool and dry on long runs or in warm weather. The flatline seams with flatlock stitching provide a soft, smooth touch while maintaining long-lasting durability. Retro-reflective details bounce light back at its original source, enhancing visibility during low-light conditions. International shipping is not available. 100% polyester. Imported.