Product Features:

• One pack for easy use, easy to convert backpacks and briefcases
• Hidden zipper design, thieves can't start
• Three opening angle designs (30°, 90°, 180° respectively)
• There is an anti-theft security lock and stainless steel wire to prevent the backpack from being taken away when not paying attention
• The front of the backpack has a high-strength anti-cutting deck with a built-in, lightweight stainless steel frame on the side.
• The inner compartment contains elastic and mesh patch pockets, tablets and computer bags
• The backpack weight loss mode makes the weight of the bag fit perfectly to the back
• Night reflective strips to protect nighttime security