Ball Sport Idear Each backpack is designed with an external multi-purpose pocket that fits any size soccer ball, basketball, volleyball, basketball, baseball or football etc. Ergonomic back panel & Luggage Trolley Belt Superior Comfort Featuring ergonomic shoulder straps and Airflow back technology Honeycomb design，hoist your work items with utmost comfort. When traveling, just glide the add-a-bag sleeve over your luggage handle for easier mobility. Lay-flat and U-Shap Design Easier loading and unloading.90°to180°flip open for security scanning. You don't need to take out any devices, making the security check faster.This backpack is good for your airplanes travelling. Water Resistant This Tech backpack is made of oxford fabric which has outstanding abrasion resistance, high tear strength, tensile strength and flexing endurance, anti-odour. You can use it under the slightly rain.