Abstract: A hiker's day pack comprising: a backpack being formed of one or more walls, each wall having an exterior surface and an interior surface, the backpack including adjustable shoulder straps affixed thereto, the shoulder straps permitting users to carry the apparatus on their backs, a plurality of pockets and retainment devices being positioned on the exterior surface of the backpack, the pockets permitting the user to retain a plurality of different items therein, the backpack including coupling devices to permit retraction of a wall thereof, the interior of the backpack including a plurality of pockets and retainment devices, the pockets and retainment devices adapted to firmly restore various items and supplies therein.