This black Sweaty Betty running backpack is made with lightweight, water-resistant fabric. It features adjustable straps for the chest and waist with buckle fastenings, logo detail, two internal compartments including a water bottle holder, and three external zip pockets. When we saw Cinderella run from the ball, we couldn’t help but think she could have benefited from having this Sweaty Betty backpack to store her glass slippers. It’s the Sprints Charming she actually needed.