This Michigan State Spartans back sack has all the right stats to be you daily go-to. Mesh trim for airflow Front zip pocket Interior zip pocket Adjustable shoulder straps 20 X 15 Polyester Spot clean Imported Shop our full assortment of Michigan State Spartans items here. When you’re a fan, you’re family! Size: One Size. Color: Team. Gender: unisex. Age Group: adult.