The Nike Brasilia Training Gymsack is a medium-sized drawstring bag in black and yellow, featuring  adjustable shoulder strap, and inner divider for organization. Made of polyester, canvas, this bag is suitable for travel, casual, and workwear occasions. With a modern and colorful theme, this backpack from Nike's product line Perfect for school or sports activities, this stylish gym sack is both practical and trendy. These is a mark on the back