High quality. Fabric is soft, lightweight, and absorbs sweat/moisture rapidly, allowing you to keep cool in the heat. One size fits to the most. Flat lock seams stitching - seamless knit structure allows flexible mobility. Anti odor & anti itch material - pulls moisture away from the skin and dries quickly; comfortable even with longer use. Cool-x technology keeps the arm cool and dry quickly to protect your arms: upf 50+ sun protection provides 99% uv protection so you don't need to worry about sun damage.