People often pay less attention to the construction of the sleeping bag while they are going to buy one, because it is inside the sleeping bags and we couldn’t see or touch directly. You have to know that the construction of down sleeping bag is a very important part of determining the warmth of sl

Let’s have a look into some home supplies that are filled with down: down quilt, down jacket. If you go around in a shopping mall and have a look at those down quilts or down jackets, you’ll find out that they are all design as a cloth that has many squares on it,no matter the brand or price. So, wh