Zoot Sports Women's Performance Hydro Crossback Triathlon Tank nylon Body: 200 g. 80% nylon/20% spandex Endura. Inset 1: 175 g. 83% nylon/17% spandex Ventilator Mesh . Inset 2: 180 g. 81% nylon/19% spandex Power Mesh Machine wash cold, Gentle cycle, No softeners, Dry Flat, Do not bleach, Do not dryclean TW