Sofie [simple backpack undergoes a series of the complicated production processes including washing, photoetching, stripping of photoresist and coating.
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To guarantee the luminous efficiency of Sofie casual backpack, its materials have undergone rigorous screening and only those that meet international lighting standards are selected.
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Sofie casual backpack has passed various kinds of tests according to international lighting standards. In some cases, some even tougher standards such as vibration test are adopted to make sure that it is going to last.
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Sofie simple backpack is certified. It not only meets the requirements of GB and IEC standards but meets the UL safety certification.
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The lighting technology used in Sofie casual backpack is constantly upgraded. It is also proven to become the preferred lighting technology in the lighting industry.
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The product is dust mite resistant. Its materials are applied with an active probiotic which is fully approved by Allergy UK. It is clinically proven to eliminate dust mites, which are known to trigger asthma attacks.