Patent pending locking system reinforced with 49 strands of steel - programmable combination lock (included). Ultra high molecular weight polyethylene (UHMWPE) fabric used by military and NASA for its strength and durability. Secure interior pocket with RFID-blocking technology to prevent identity theft. Water and stain resistant coating. Capacity is 11 liters. Measures 13.5" wide x 17.5" tall. Weight (with lock) is 12 ounces.