Grenade Astro Pack Backpack : The Grenade Astro Backpack is primed and ready to unleash some explosive style! Spacious main compartment can hold all the essentials for an extended session. Skate carry straps on the front of the bag are concealed by the front accessory pockets. Padded and contoured straps for supreme comfort. Sternum straps and a waist belt are featured for secure riding. VIVA GRENADE!