Ruian Shiwei Trading Co.,Ltd. established in 2005 and located the ancient city-Ruian City which has the good reputation of the heaven on earth. We specialize in developing, manufacturing, and selling heat packs. Our main markets are the France, United Kingdom, Europe, USA, Japan and Canada.

Sigo fetch in the advanced technology from Japan, have a perfect quality management system, and own the advanced laboratory, modern equipments, the advanced test instrument and method. These provide dependable assurance in product improvement, new product development and high-quality product.