The consumer alert jointly released by the Fujian Provincial Consumer Council and the Market Supervision Bureau shows that 80% of complaints about suitcases are due to incorrect material selection and key component failures. Mastering the purchasing logic of "distinguishing the quality of materials, examining the details of components, and determining the specifications of scenes" can help consumers avoid 90% of pitfalls.

Material selection is the core defense line: 100% PC (polycarbonate) material is preferred for hard boxes, such as the German Bayer Makrolon used in the CASETiFY TRAVEL series ®  PC， It combines lightweight and drop resistance, and remains intact even after a 2-meter drop test; Although aluminum magnesium alloy has outstanding texture, its weight is 1.8 times that of PC material, and it is prone to scratches, making it more suitable for short business trips. For soft boxes, priority should be given to nylon fabric with a density of 840D or higher, which is used in conjunction with a waterproof coating. Its expandability is 30% higher than that of hard boxes, but it has weaker protection for fragile items.

The key components determine the service life: the wheels are designed with 360 degree universal wheels from Japanese brands such as Hinomoto. The stability of the double row eight wheel design is 50% higher than that of the four wheel design. The wear resistance of rubber wheels is three times that of ordinary plastic wheels, and the noise during implementation can be controlled within 30 decibels. The preferred choice for the pull rod is aviation grade aluminum alloy, and the expansion and contraction test should be smooth without any lag, with a shaking gap of no more than 2 millimeters. The TSA customs lock with a red diamond logo is required for locks to prevent violent unboxing during entry and exit. The customized YKK zipper used by CASETiFY also has anti puncture function, solving the problem of traditional zipper detachment.

Scenario adaptation rule: Choose a 20-22 inch chassis for 2-3 day short distance trips, and it is recommended to choose an intelligent model with a USB charging port; Priority is given to 26-29 inch shipping containers for long-distance trips of more than 7 days, with a PC+aluminum frame structure that balances protection and expansion; Business travel can choose an 18 inch leather case, with built-in computer compartments and file pockets for more practical design. Remember the usage technique of "placing heavy objects on wheels and avoiding excessive stuffing", which can extend the life of the suitcase by more than 30%.