The ratio of raw material costs to total cost of school bag depends on the different materials used by producers in their production. In manufacturing, material costing is a basic requirement for success. In order to be competitive and profitable, manufacturers must understand and control material costs. In the future economic conditions, many manufacturers are constantly looking for ways to improve material efficiency in order to maintain a surplus and competitive advantage by providing customers with maximum profits.

Sofie Bag Co., Ltd. is a Chinese company with years of experience in shoulder sling bag design and manufacture. Our expertise and knowledge are unrivaled. backpack is the main product of Sofie Bag. It is diverse in variety. The product features moisture resistance. It can greatly withstand the humid environment for a long time without changing its property. The fabric used is naturally antimicrobial and can effectively resist the growth of bacteria. The reliable performance and long operational life of this product certainly make it a good value for money from the perspective of users in the long run. It has smooth zippers which won't easily get stuck.

Satisfying customers with our considerate service and excellent school bag is what Sofie has been striving for. Get info!