Gregory Arrio 20L Daypack Shadow Pine Black One Size. Specifications for Gregory Arrio 20L Daypack: Manufacturer: Gregory Size: One Size Gender: Unisex Pack Type: Daypack Pack Volume: 20 liters Fabric/Material: 210D Nylon Ripstop Age Group: Adults Features of Gregory Arrio 20L Daypack A body-hugging fit that supports dynamic movement and optimal comfort on-trail Experience optimized airflow stability and temperature regulation through the progressive mesh and frame supported backpanel The ideal day hiker toolkit that offers a clean modern design with no compromise on performance access or comfort Package Contents: Gregory Arrio 20L Daypack Gregory 157881-A798: Arrio 20L Daypack Shadow Pine Black One Size