Bauer Core Long Sleeve Integrated Senior Ice Hockey Top 84% polyester Anti-Microbial--Anti-microbial treatments provide permanent odor protection by inhibiting the growth of bacteria and mildew in the fabric. 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. Flatlock Stitching--Seams are sewn flat to the garment to enhance durability and prevent skin chafing/irritation. Fabric Content: Main Body: 84% polyester, 16% spandex