40L Expandable Backpack - Convertible Anti-Theft Carry-On with Laptop Compartment for Men & Women (20.5" Large, Black)

Technical Specifications: Dimensions: 20.5" × 12" × 6.7" (52 × 30 × 17 cm) Capacity: 40L (expandable to 45L) Material: 1680D nylon + TPU laminate Package Includes: 1 × 40L Backpack Why Travelers Choose This Backpack? ✅ Airline-Tested: Complies with cabin policies of over 45 global carriers ✅ Security-Focused: Slash-proof panels + locking zipper pulls ✅ Eco-Conscious: 30% recycled materials Engineered for Global Explorers! Ideal For: Business travel (1–5 day trips) International backpacking Campus commutes Outdoor adventures Urban EDC (Everyday Carry) Pro Tips: ① Use compression straps to meet strict airline size limits ② Clean with nylon brush + mild soap ③ Store half-zipped to maintain shape • Military-Grade Durability 1680D ballistic nylon exterior withstands 10,000+ abrasion cycles (ASTM D4966 tested) YKK AquaGuard zippers + RFID-blocking pockets for weather/tech protection • Professional Organization Padded 15.6" laptop sleeve (18x11x1.5") + tablet compartment with shock-absorbent foam 10 functional pockets including hidden passport slot, A4 file divider, and quick-access admin panel • Multi-Mode Versatility Converts between backpack/duffel/shoulder bag via reinforced 360° grab handles TSA-approved lockable design fits airline carry-on dimensions (20.5x12x6.7") • Ergonomic Comfort System 3D ventilated back panel + load-balancing waist strap distributes 40L/18kg loads Adjustable sternum strap with emergency whistle for outdoor safety • All-Weather Performance PU3000mm waterproof coating protects contents in heavy rain Quick-dry mesh lining resists odor/mold in humid conditions