Synthesizing the history of major overseas brands, it is not difficult to find that their founders are professional outdoor athletes, Sea to summit is no exception, this outdoor brand from Australia, although it began to develop only small accessories, but has developed a comprehensive outdoor equipment market, and there are also flagship stores in China that can be easily purchased, and the price is basically between 2000-4000 yuan.
 
Sea to summit is a comprehensive outdoor brand, for the design of a single product for the purpose of mass production, so its sleeping bags have a standard design plate type, the style gap is not large, the advantage is that all sleeping bags use a fixed zipper length, through the zipper any two sleeping bags can be assembled, is the most friendly sleeping bag for double people, especially for couples camping.
 
The down used by Sea to summit does not have a targeted treatment technology, but pays more attention to the research and development of fabrics, and the most widely used 2D NanoShellTM double-layer fabric, the internal barrier layer has the characteristics of not being easy to get wet by water, which can prevent the down from being wet by condensation beads, and ensure a dry and high fill power state.
 
There are six series on sale: Micro, Alpine, Ember, Voyage, Latitude, and Spark SP. The products under the series are distinguished by Roman numerals, and the larger the number, the higher the filling volume, the more suitable for low temperature environments.
 
Both Micro and Alpine are filled with goose down and 2D NanoShellTM fabric, making them ideal for alpine adventures and extreme cold environments. Alpine is a conventional mummy-style sleeping bag, but the size of the neck placket is too large, and you need to pay attention to windproof, and the price is about 4,000 yuan. The Micro form is more free, the feet are designed with a drawstring, you can walk in a sleeping bag, and the full-length zipper of the main body can also be fully unfolded after opening, and it can be used as a duvet, and the price is within 3000 yuan.
 
Sea to summit also has a lightweight Spark SP series, suitable for traveling, adventure-style endurance races, summer cycling trips, sleeping bag liners, ultra-light hiking, ultra-light Alpine climbing, horizontal vertical lining sewing, double-sided design, can also be used as a lining for other sleeping bags, increase the use temperature, the price is about 2000 yuan.