Let the rival fans know that you're a die-hard fan of the Colorado Rockies with the New Era Rockies 950 EG Side Patch. Crafted with premium-quality fabrics, this adjustable hat offers plush comfort and adds sport-inspired style to your game-day look. Cheer on your favorite team till the last with the New Era Rockies 950 EG Side Patch. Crown/Visor & Button: 100% polyester; Undervisor: 100% cotton.