Osprey is a backpack brand founded in Santa Cruz, California, in 1974. Founder Mike Fortenhauer began his career in a workshop custom-making backpacks for himself and his friends. He has consistently pursued comfort, based on the belief that a well-fitting pack is a comfortable one. Osprey's unique features enhance comfort and ease of use, including the "Anti-Gravity" back system, which covers the entire back with a 3D mesh, the "Fit-on-the-Fly" hip belt, which allows for easy length adjustment while walking, and the "Stow-on-the-Go" system, which allows for quick storage of trekking poles. Representative models include the "Aether/Ariel" series of large backpacks for long trails, the "Atmos/Aura" series of lightweight trekking packs, and the "Talon/Tempest" series, popular for day hikes and everyday use. This page offers used Osprey backpacks, daypacks, and travel packs.