Capacity: The capacity of the backpack should depend on the length of your trip and the items you need to carry. Generally speaking, 20-40 liters of backpacks can be used for short trips, 40-60 liters can be used for mid-way trips, and more than 60 liters may be needed for long-distance hiking.

Activity type: consider the types of outdoor activities you will engage in, such as hiking, camping, mountaineering, cycling, etc. Different activities may require different types of backpacks to adapt to different environments and equipment needs.

Backpack mode: Backpack has two types: inner frame and outer frame. Inner-frame backpacks are close-fitting and suitable for flexible movement, while outer-frame backpacks are more suitable for carrying heavier equipment because they can provide better support.

LUPU products are made of high-quality materials and technology, which have excellent durability and can withstand the test of outdoor environment.

LUPU products are usually flexible and diverse in design, suitable for all kinds of outdoor activities, such as hiking, camping, mountaineering, etc., providing users with multiple choices.

LUPU's backpack is equipped with an excellent load-bearing support system, which can evenly distribute the weight and reduce the burden on users.

It is waterproof and water-resistant, protecting users' equipment from rain and bad weather.

Backpack: Empty the backpack to remove dirt and residue. Wipe the surface with a damp cloth. You can use warm water and mild soap. Avoid using strong chemical cleaners.

Tent: Remove the dirt and sundries on the surface before dismantling the tent. Follow the cleaning instructions of the tent manufacturer to avoid damaging the coating and sealing line. Dry the tent completely to avoid long-term storage in a wet state.

Shoes: Clean the dirt and sundries inside and outside the shoes. Wipe the surface gently with a damp cloth, and use a mild shoe cleaner.

Sleeping bag: Dry the sleeping bag regularly to keep it dry and fluffy. Avoid compressing sleeping bags for a long time. You can use storage bags or hang them to keep them fluffy.

Raincoat and waterproof coat: Wash with warm water and mild soap, and avoid using strong detergent. If the waterproof performance is weakened, you can use a specific waterproof spray to repair it.

Official website: Visit the official website of LUPU brand, and usually you can find relevant information in the "warranty", "service" or "support" section of the website.

Product manual: If you have purchased LUPU products, you can refer to the manual or warranty card attached to the product, which usually explains the warranty policy in detail.

Contact customer service: contact the customer service department of LUPU brand, who can provide you with detailed information about the product warranty policy.

Retailer: If you bought LUPU products through retailers, you can also ask them if they provide warranty information.

1. According to different series and types of LUPU backpack products, backpacks are classified into different sizes, such as small, medium and large.

2. For each size classification, explain the capacity range of the backpack of that size. For example, the capacity of a small backpack may be below 20 liters, and that of a medium backpack may be between 20 and 50 liters.

3. Each size is suitable for different types of outdoor activities, such as daily wearing, short-distance hiking, long-distance hiking, etc. Consumers choose the appropriate size according to their own needs.

4. According to the height and weight range, evaluate whether it is suitable for you to use outdoor products of this size, and ensure whether the backpack system of each size can be adjusted to adapt to the comfort of the backpack system.