The Large #4500, features a new built in padded compartment that can accommodate a standard sized laptop computer.The Large is designed to carry the heaviest load in our product assortment and fits larger frame students of all ages who are 5' 5" or taller or whose body measures 17" or more from the top of the shoulder to the natural waist.Physicians recommend that students carry no more than 15% of their body weight on their shoulders and backs, yet studies show younger students are lugging as much as 40% each day.Standard ergonomic design features include: patented lumbar air cushion and wider, foam cushioned shoulder straps, adjustable both top and bottom with unique slide strapping that automatically adjust side-to-side to help maintain correct ergonomic support.Additional features include: padded haul handle, built in padded laptop compartment, two large interior compartment for heavier books and other necessities, side cinch straps to secure extra load closer to the back, a large front pocket with organizer for notebooks, pens and pencils (even a handy key keeper, CD player pocket and headphone ports), a front zipper pocket, padded haul handle, one side mesh bottle pocket, one side fabric pocket with buckle and a new detachable cell phone/mp3 holder.Made of durable Poly Oxford 600-denier material. Comes in a variety of popular colors. Dimensions: 18" x 12.5" x 12". Capacity: 2600 cubic inches. Mini air pump included.Care Instructions: Hand wash with mild soap or wipe with damp wash cloth. Air dry, machine wash and dry is not recommended.

Patented air technology reduces stress on back by up to 80%,lightens effective load by 50%.

Transfers weight from shoulders to lower back for revolutionary comfort and support.

Recommended by the Congress of Chiropractic State Associations.

Fits individuals 5' 5" or taller or 17" or more from the top of the shoulder to the natural waist.

Product dimensions: 18" x 12.5" x 12".Capacity: 2600 cubic inches.