You?ll find Osprey?s Manta AG? 28 is ideal for a day hike. The Anti-Gravity (AG?) suspension system?combination of LightWire? frame, mesh backpanel, BioStretch? shoulder harness and AG? hipbelt?distributes weight to keep you comfortable no matter how far you roam. Dual upper and lower compression straps help stabilize the load and provide add-on storage options if you have extra bulky gear.