Challenging elite runners in hot and humid conditions in Asia, we developed the ultimate combination of lightweight, breathable and ventilated fabric and mesh. The P1 Elite Shirt uses SA1NT's L1te technology to enhance your run and set you free. size XS|S|M|L|XL|XXL Product Features + Lightweight 96gsm run fabric. Maximum moisture management and breathability + Ultra-lightweight 3D 80gsm knitted mesh back panel for maximum breathability and heat dissipation + Contains xylitol for a cool feel on the skin. + Bonded side seams for low profile comfort.