*Windy to tie and store and heat resistance test was conducted by Guangzhou Inspection Testing and Certification Corporation Co., Ltd. Test Report No.: 220148304.*Touch screen compatibility test was conducted by Guangzhou Inspection Testing and Certification Corporation Co., Ltd. Test Report No.: 220148304.*Grade 4 waterproof performance test was carried out by Guangzhou Inspection Testing and Certification Corporation Co., Ltd. Test Report No.: 220148304.*Zipper airtightness test was conducted by Guangzhou Inspection Testing and Certification Corporation Co., Ltd. Test Report No.: 220216092.