This tank is so light, it's like wearing nothing at all. Ideal for hot summer training runs, it features reflective details and a soft polyester/nylon blend fabric. Lightweight, breathable, anti-bacterial, and anti-UV, it packs heavy-duty performance into an ultra-light package. 80% nylon, 20% spandex Sizing note: These are designed to be a close fit tank, if you like more room, please size up. Nylon Tank Top For Light Exercise, Sleeveless Mesh Activewear For Light Exercise, Sleeveless Nylon Top For Light Exercise, Nylon Athleisure Tank Top For Light Exercise, Nylon Tank Top For Light Exercise And Athleisure, Nylon Tank Top For Light Exercise, Athleisure Style, Sleeveless Breathable Mesh Activewear For Light Exercise, Functional Breathable Mesh Sleeveless Activewear, Athleisure Compression Breathable Tank Top