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toe warmer - 10:59, 2010-Apr-1

The toe warmer is a fine secret weapon, it will last for hours. For most folks, booties over summer shoes just don't work at temperatures much below freezing. When removed from the packaging, the air activated warmers come to life for instant heat! When placed inside the secret sock pocket, they will generate soothing heat for up to 6 hours+ Ideal for use when fishing, hunting, skiing, or sitting around the camp fire. Sold as pairs.

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hand warmer - 10:58, 2010-Apr-1

Mini Hand warmer provides warmth and pain relief for your body. It also can be carried on day trips and away matches where conventional hot packs are not practical. When removed from the packaging, the air activated warmers come to life for instant heat! When placed inside the secret sock pocket, they will generate soothing heat for up to 12+ hours+ Ideal for use when fishing, hunting, skiing, or sitting around the camp fire.

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How do cold packs work? - 04:36, 2009-Aug-20

Instant hot and cold packs are used by athletes to quickly and conveniently treat an injury. They last for about 20 minutes. The packs take advantage of chemicals that either absorb a lot of heat or release a lot of heat when dissolved in water. When a chemical process absorbs a lot of heat it is called endothermic. When heat is released, it is called exothermic.

In cold packs, ammonium nitrate is used because it absorbs a lot of heat when it dissolves in water. The water and ammonium nitrate are in separate compartments in the pack. When the cold pack is needed, the chambers are broken and the ammonium nitrate dissolves in the water, absorbing heat and making the pack as cold as 0C.

In hot packs, calcium chloride or magnesium sulphate are used, along with the water. They release heat when the chambers are broken and the chemical dissolves in the water. A hot pack can reach a temperature of 90C.

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Shanghai Dayun Industrial Co.,Ltd - 04:34, 2009-Aug-20

Shanghai Dayun Industrial Co.,Ltd. established in 2007 and located the ancient city-Shanghai 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.

We keep on improving production equipments. Most materials at low cost are purchased locally in China. With the good educated and trained team, we constantly improve product quality, decrease leading time, improve efficiency, and develop new products, while maintaining our reasonable prices. Convenient transportation ?inearby Shanghai port ?jmakes our cost structure even more competitive.

We are confident that with our manufacturing strengths and excellent quality that you will find us an unbeatable company to work with for all of your supply needs. We hope to establish the leader position in global market in the future.

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