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. Fit & Design: Short sleeve Flat knit collar 3-button placket 4-way stretch for full range of motion in your swing Lightweight feel Technology: Moisture wicking UPF 40 sun protection Additional Details: Made with at least 90% recycled materials