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. If performance MATTRs to you, it MATTRs to us! Details: Moisture Wicking Breathable Fast-drying 4-way Stretch Lightweight 92% Polyester Recycled / 8% Elastane