Cratere is a running backpack made from strong water-resistant nylon. Extremely lightweight, its ergonomic shape fits perfectly to the movements of your body, not thwarting them.nReflective details, positioned on base and shoulder straps, make sure that you will always visible, especially at night. The special perforated breathable surface on the back and shoulder straps encourages heat dispersion. Inside there is a compartment designed to store a water bag, or in the absence of this, as a divider or as a tablet holder (the hole for the straw can be used for the earphones).nCratere remains firm and stable on the body by means of an adjustable chest strap and removable waist belt, equipped with a special elastic pouch compatible with Smartphones up to 6 inches. Finally, there is a zip-closure external pocket on the base.