NOT YOUR BASIC BACKPACK: Continues to be a top selling internal frame backpack on Amazon at a great price for all the included features; Backpack for men and women VERSATILE BACKPACK: Just right for youth and adults for backpacking; 4,000 cubic inch (65 L) capacity; Best for 2-5 day trips; weighs 5 pounds (2.3 kg) COMFORT YOU CAN CUSTOMIZE: Multi-position torso adjustment fits wide range of body sizes; Durable open-cell foam lumbar pad and molded channels provide maximum comfort and airflow