TETON SPORTS Explorer 4000 Internal Frame Backpack &ndash; Not Your Basic Backpack; High-Performance Backpack for Backpacking, Hiking, Camping; Sewn-in Rain Cover NOT YOUR BASIC BACKPACK: Continues to be a top selling internal frame backpack on Amazon at a great price for all the included features VERSATILE BACKPACK: Just right for youth and adults for backpacking; 4,000 cubic inch (65 L) capacitylarge enough 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 TRUSTED QUALITY: Hiking backpack with hundreds of verified 5-star reviews testifying to the quality and design; sleeping bag compartment, compression straps, and exterior pockets for strategic packing TETON SPORTS PROMISE: Reach out to our AMAZING customer service team if you have any questions or concerns; YOU CAN COUNT ON US to get you taken care of and back OUTDOORS with TETON Sports