adidas Big Boys' Youth Core Wind Jacket 100% Polyester Taffeta. Fit: Relaxed--Full cut for ease of movement and versatility in layering. Fabric Type: Taffeta--A lustrous plain weave fabric with a smooth, crisp feel Fabric Type: Mesh--A knit or woven fabric with small, evenly spaced holes Performance Technology: adidas ClimaProof --Blocks wind, rain, and snow while allowing heat and sweat to escape through evaporations, keeping you dry and comfortable in even the harshest conditions. Ventilation--Mesh or breathable fabric inserts in high heat zones allow sweat to evaporate and cool air to circulate.