Properties: 4F brand backpack made of high-quality materials external compartments with zippers open side pockets handle for carrying in the hand adjustable straps capacity 20l reinforced bottom manufacturer's logo Color: navy; Properties: 4F brand backpack made of high-quality materials external compartments with zippers open side pockets handle for carrying in the hand adjustable straps capacity 20l reinforced bottom manufacturer's logo Color: black; Properties: 4F brand backpack made of high-quality materials external compartments with zippers open side pockets handle for carrying in the hand adjustable straps capacity 20l reinforced bottom manufacturer's logo Color: gray