1, reasonable distribution of weight is the most critical: half of the total weight of the items in the roof box should be in the middle position, and the remaining half of the weight is distributed in the front and rear of the roof box position. This can ensure that the weight of the entire roof box can be evenly distributed to the roof rack and the body parts connected to it.

2, the total weight of the roof box and the loaded items should not exceed the maximum weight that the roof of the car can withstand, about the maximum weight that each model can withstand, please refer to the vehicle manufacturer to provide the car's manual.

3、If you carry skis in the roof box, make sure the skis are tied down with straps so that they do not slide back and forth in the roof box. It is recommended to lay a layer of rubber mat or moisture-proof mat to increase friction.

4, the roof box has a dust and sand and waterproof role, but its sealing is not absolute, it is recommended that the items susceptible to moisture with moisture-proof bags or plastic bags wrapped to protect them, but also can be clean items and more dirty items divided up.

5, the roof box can be directly rinsed with water, washing the car with a high-pressure water gun can be rinsed, but pay attention to control the direction of the water flow, the roof box can be rainproof but its sealing can not withstand the high-pressure water gun from the bottom up high pressure. Suggested horizontal rinsing or top-down rinsing.

6, long-term top of the empty roof box driving will increase fuel consumption, from the point of view of environmental protection and energy saving, we recommend that, if you do not use for a long time, you can unload it for use outside.