Barter is the present and the future of international trade, especially for people who is starting in the import export business. Barter and more: Triangular operations.
Features of down sleeping bags
The material of down can be divided into white goose down, white duck down, grey duck down, water bird down and so on.
The warmth per unit weight is the most effective. Feather sleeping bags are relatively warm, easy to squeeze, easy to keep in place, and have a long service life. The disadvantage is that the price is high, it will absorb water, and the wet sleeping bags are quite poor in warmth. Unless it takes more than a day to dry completely, these characteristics are deeply doubtful for the selection of feather sleeping bags in wet environments. The soft feathers are from the bottom outer feathers of adults and juveniles. Most of the feathers used are domestic animals. The by-product is filled with exquisite elasticity. Generally, the basic elasticity is 550-fill, and the high quality is 650 or 700-fill. It is the lightest, and its service life is three times longer than that of synthetic fibers.
Sewing method: There are three basic stitching methods for feather sleeping bags: one is sewthrough, the other is slanttube, and the third is overlappingtube. The first stitching method is simple and not complicated, but the heat energy is easily dissipated from the suture line, and the second stitching method is most Sleeping bag sewing method. This method can exhaust the cold air out of the sleeping bag. The third is the most ideal way. These sleeping bags are more expensive. Most sleeping bags are designed with a channelblocks, which can prevent the feathers from moving around.
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