osprey daylite 18 Amazon.com : Hikelite 18L Lightweight Hiking Backpack cut ventilation foam for breathable cushioning and load lifters for balanced weight distribution Osprey Hikelite 18L Daypack Review:

It's pretty sensitive and very, very light

LARGE SIZE:12.9 inches x 5.07 inches x 17 inches, which can fits laptop up to 15.6 inches. This school backpack have suitable construction that allow you pack so much but does not look overstuffed.Perfect for men and women to go to school, business, shopping, weekend get-away, tourism, gym, hiking, biking, camping, etc

We're evaluating LTE coverage and reliability in the kinds of places hikers actually go: trailheads with marginal cell service, river canyons, alpine basins, and dense forest

Testing & Warranty Leading manufacturers test each bag via tensile load , abrasion , and weather exposure