This Chest Bag Is Made Of High-Quality, High-Density, Durable Materials, Good Wrinkle Resistance, Sturdiness And Durability. High Storage Capacity, Can Hold Many Items, Such As Books, Clothes, Cameras, Etc. There Is A Patch Pocket On Each Side Of The Chest Pocket, You Can Put An Umbrella Or Water Cup, Etc. The Strap Is Lightweight And Can Reduce Shoulder Pressure. The Breathable Thick Shoulder Strap And Back Panel Are Very Comfortable And Light, And Heat Dissipation Does Not Accumulate. Adjustable Padded Shoulder Straps Make This Backpack Suitable For Most People.