Personalized “Austin” in light blue threading. Never-been-used Dinosaur Glow-in-the-dark backpack. Durable, functional and oh-so-playful, the Mackenzie backpacks are packed with pockets, straps and gear loops to keep everything in place. Made of water-resistant polyester and featuring adjustable padded shoulder straps, exterior straps to hold a Mackenzie lunch bag and exterior side pockets fitted to Pottery Barn Kids water bottles, it's the most efficient and playfully designed collection around. DETAILS THAT MATTER Made from rugged, water-resistant 600-denier polyester. The backpack has adjustable straps that are contoured and padded to ensure a comfortable fit; padded back panel adds extra cushioning. Exterior side pockets are designed to hold any of the Pottery Barn Kids water bottles. Sizing information: Mini backpack holds a snack, a change of clothes and a favorite toy.