1. How long is the shelf life
Shuai & Mei warmer valid for 48 months; mini warmer for 36 months; foot warmer, long foot warmer, cartoon hand warmer, baby warmer, easy to use for 36 months on the shoulder and neck;
2. The packaging says that it is effective for shoulder pain and low back pain. What principle is used to achieve the effect?
Due to the influence of the substances that can cause fatigue accumulated in the muscles, the warmer can heat the painful area to promote blood circulation and achieve the purpose of preventing the accumulation of fatigue substances, thereby alleviating shoulder pain and low back pain.