GLRSBUTY 40L Waterproof Shoulder Backpack Nylon Travel Daypacks for Hiking Useful-The bag has special ribbon to fixed climbing Sticks so it is a good choice for climber . Safety-The Whistle on the clips is a very useful design when you need others help . Comfort - waterproof nylon material, all the same adjustments, air vents for your shoulder and back . Convinent-The bag has plenty of compartments and a big main compartment , you can sorting placement your incidentals and everything else went into the main compartment. Demition : 10*7.8*19.6 inches(L*W*H) Weight:1.3 pounds