The Harper laptop backpack has a trolley strap for maximum ease, soft shoulder straps, and a water bottle holder to ensure every practicality is considered. It is a practical, multi-purpose backpack made of durable high-density fabric, sized to double up as a convenient underseat cabin bag. Designed to comply with most major and low-cost airline additional “personal bag” carry-on policies, while the dimensions give maximum packing capacity within the allowed carry-on restrictions. 100% Polyester.