Osprey Daylite Pack Deluxe Detachable Daypack The Daylite converts to a simple daypack with a buit-in/tuck away spacer mesh harness. Use it as a pillow for a good night's rest Daylite Works With: Argon, Xenon, Aether, Ariel, Exposure, Sojourn and Porter Series Mesh covered ridged foam backpanel with central air chimney Panel loader with front slash pocket w/ key clip, mesh side pockets, and front laced bungee compression