MATTR (Materials, Technology & Research) is the performance fabric designed for the highest level of comfort no matter the climate condition. Featuring technical moisture-wicking, fast-drying fabric, with breathable, four-way stretch and a lightweight feel, this material will give you everything needed to go low. Details: 92% Polyester Recycled / 8% Elastane UPF 40 Moisture wicking Machine Wash and iron inside out in cool water with similar colors Permanent press cycle Do not bleach Do not tumble dry Cool iron Do not dry clean Close all fastenings Do not iron print Use only mild detergent