Shoulder Strap System Specially Contoured are Ergonomically Designed with Added Padding for Comfort and Control * Airflow Back System Multi-panel Airflow Design Provides Extra Padding for Comfort and Maximum Back Support * Sunglasses Holder Elastic Tab on Shoulder Strap Keeps Sunglasses Securely and Conveniently Accessible * Padded Laptop Sleeve Secure Padded Compartment Accommodates most 15" Laptops * Water Bottle Pockets External Dual Pockets Feature Elasticized Mesh which Expands to Secure Various Size Water Bottles * Interior Pocket Organizer provides Detachable Key Fob and Divider Pockets for Pens Pencils Cellphone and CDs