Individuals with allergies should first conduct a 24-hour skin test behind the ear or on the inner arm. Only proceed if no redness, swelling, itching, or discomfort occurs. Before wearing, ensure the chest skin is free of wounds or inflammation, and avoid applying perfumes, lotions, or other skincare products to minimize allergy risks.

Primarily using bio-adhesive and medical-grade silicone adhesive. Bio-adhesive offers strong sweat absorption and stable adhesion, lasting approximately 3,000 uses. Medical-grade silicone adhesive is bubble-free with moderate humidity resistance, maintaining adhesion even after sweating. Suitable for most skin types, avoid adhesives with strong, irritating odors.

The core materials consist of medical-grade eco-friendly silicone and food-grade bio-based adhesive. Both have passed EU REACH, US CPSIA, and China GB 18401 safety certifications. They are odorless, hypoallergenic, and feature a texture close to human skin, ensuring comfortable fit and compliance with safety standards.