Taikes Waterproof School Satchels and Student Bag Dimensions:50*32*15cm, Choosing Waterproof Material. Ulti-panel Airflow Design Provides Extra Padding for Comfort and Maximum Back Support Shoulder Strap System Specially Contoured Shoulder Straps are Ergonomically Designed with Added Padding for Comfort and Control Water Bottle Pocket Zippered Pocket in the Front of the Bag Perfect for Storing Anything that Needs a Little Extra Padding Constructed of Durable Nylon Materials; Water-resistant Case Bottom; Durable Metal Accents and Zipper Pulls