The Constitute Lifestyle Backpack is a no-nonsense pack, made of a 500 Denier Polyester and fully lined. The lining is patterned with a bright electric blue and white striped pattern that makes finding your items in a deep dark backpack easier than ever. The heavyweight and highly durable outer shell material is constructed with a classic design that creates the perfect balance between a rugged rucksack, and a classy briefcase. We don't skimp on space either, with 25 Liters of space, this bag is perfect as a day pack, school bag, or work companion. We’ve kept your laptop in mind as well, keeping it safe from scratches and dents in a fully padded fleece lined laptop sleeve. Unlike other bags of similar design, we opt to keep your favorite water bottle, up to a 32oz, secure in a fully adjustable stretchy water bottle pocket. Iconic design paired with incremental and important improvements make this the perfect bag will keep your valuables safe and sound.