1. TSA Anti theft Lock and External 4.0A USB faster charge port design
2. Anti-Freeze and Waterproof, High-density & High-quality oxford material
3. Scratch-resistant, fadeless, more reliable and durable
4. 40°-180° opened design travel backpack, light weight & weight balance
5. Ergonomic back design, Luggage strap, back anti-theft zipper pocket and the breathable back cushion
6. Other convenient details design, such as shoulder card zipper pocker, glasses hanger
Note: only the T-B3611 has pockets for cards or glasses on the straps, the upgrade not
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