Material: The backpack is made of sturdy Oxford cloth fabric, which does not deform, does not open, has strong tension, is not easy to wrinkle, and can be used for a long time. Adjustable shoulder straps: The travel bag is equipped with adjustable foam padded shoulder straps, which can be adjusted to the appropriate length at will to relieve the pressure on the shoulders, and the back is padded for increased comfort. Practicality: There are side pockets on both sides to fix your water cups, umbrellas and other items, which are more durable and convenient. Versatility: This casual hiking bag can be used to carry a variety of personal items such as laptops, folders, clothes, etc. Intimate and practical: There is a small whistle attached to the back of the travel backpack, so that you can blow the whistle and quickly find your companions when you get lost or in danger. Washing instructions: Hand wash or wipe with a damp cloth is recommended, do not bleach. Special note: This size data is measured when laid flat. Due to different measurement methods, an error of 1-3cm is normal. Warm reminder: The image display effect is for reference only, and the final effect is subject to the actual product! Due to objective factors such as production batches, machinery and equipment, it is difficult to avoid or there will be slight color differences, position and size errors. If the above problems are encountered, they are normal phenomena and will not be included in the scope of after-sales processing.