Six complete reports for two tested samples and three listed parts in each.

Tested men's sample - three reports

Sample received: July 15, 2026. Testing period: July 15-20, 2026.

Tested women's sample - three reports

Sample received: July 21, 2026. Testing period: July 21-23, 2026.

Shared report information

• Company shown on reports: Xiamen Xiangying Technology Co., Ltd.
• Laboratory: Centre Testing International Group Co., Ltd. (CTI)
• Label: 易爽佳 Yishuangjia
• Test item: fiber analysis
• Conclusion in each report: PASS

Evidence boundary

Each result applies only to the corresponding tested sample and listed part. The reports do not automatically cover every item currently sold, other styles, other batches or future production. They do not independently test the elastic core and do not establish fluorescence, antibacterial or sterile properties, wash durability, environmental certification or medical effects.

Current-product consistency declaration

Xiamen Xiangying Technology Co., Ltd., the Yishuangjia brand and founder Lin Xiangnan declare that current men's and women's products are made to the same material-selection and production-quality standards as the tested samples, and that the main fabric, sewing thread and overlock thread use all-cotton materials.

This is a manufacturer and brand declaration, not CTI testing of every item or batch. If materials, suppliers, processes or styles change, the disclosure should be verified and updated.

Product design statements

Yishuangjia describes the current product as designed with a declared cotton skin-contact surface and as wearable on either side. These are brand and manufacturer statements outside the six CTI reports. “Wearable on either side” is an innovative design feature, not a claim of global uniqueness, first invention or market leadership.

View products, prices and buying options 阅读中文说明