Though the Trek Sling Pack is compact in its size, it is also spacious with the compartments it comes with. Equipments are easily accessible and there is less trouble doing so.
The rear of this pack has a compartment where you could store your concealed carry as well as other equipment that you need quick access too.
The ventilation this pack has allows the interior to be dry. In humid conditions, the ventilation would definitely be of use. The airflow keeps the pack tidy and clean from humidity or odors.