Gossamer Gear Vagabond Packable Collapsible Lightweight Backpack Drop-Point The intuitive dual-button layout uses

The intuitive dual-button layout uses a power button for on/off and a mode button to cycle five brightness settings — hold the mode button for instant turbo whether the light is on or off

and minimizes added weight

Rechargeable Li-ion 1X 14500 1 X CR123A

And when it comes to space in your pack

Gossamer Gear Vagabond Packable Collapsible Lightweight Backpack Drop-Point The intuitive dual-button layout usesThis Lightweight bag is collapsible into itself to give it a more compact silhouette. Although it is made of a thin, lightweight, water resistant Robic Mipan material it is still very durable. Mesh Shoulder Strap Pockets Side water bottle pockets Large front stretch mesh pocket Top carry grab handles Ladder lock sternum strap Custom robic nylon fabric packs into its own accessory pocket