No PrintKK logo, no PrintKK invoice, and no PrintKK information on or inside the package. Material Description: Oxford Cloth (Polyester). Product Size: 11.8"x6.7"x16.9". Design Area: Single-sided design, single-sided printing. Printing Technique: Sublimation. Product Performance: The backpack reinforcement straps are ergonomically double coated and reinforced with adjustable shoulder straps. They are shrink-resistant, stretch-resistant and wrinkle-resistant. The bottom details are reinforced to ensure firmness. Large-capacity design with external USB port, headphone cable port and label plate. One divider pocket inside and one pocket on each side. Applicable Scenario: Suitable for extra heavy and heavy backpacks. Suitable for school and outdoor use. Warm Reminder: Due to objective factors such as production batches, machinery and equipment, it is difficult to avoid or there will be small color difference, position and size errors, such as the above problems are normal phenomena, will not be included in the scope of after-sales treatment, please understand.