ASICS Reflective Vest Womens Fabric Type: Mesh--A knit or woven fabric with small, evenly spaced holes Performance Technology: ASICS Hydrology--The fabric absorbs sweat from the skin, then transfers it to the surface where it can evaporate rapidly. Hydrology fabrics provide breathability and air circulation, and most provide UV protection between 15 - 40 UPF. Ventilation--Mesh or breathable fabric inserts in high heat zones allow sweat to evaporate and cool air to circulate. Ergonomic Cut/Seaming--Seams and/or design lines of the garment follow the body's curves to allow freedom of movement and prevent skin irritation. Reflectivity--Provides visibility in low-light conditions through the use of reflective fabrics, yarns, tapes, trims, or heat transfers.