At present, there are only a handful of mature temperature regulating materials for clothes, and Outlast technology is one of them. Its temperature regulation performance and safety have been tested by the market for a long time.
It was originally developed by NASA to make spacesuits for astronauts, and then cooperated with the German special fiber manufacturer Kelheim Fiber Company to develop Outlast viscose fiber, which was applied to ordinary textiles.
On the major e-commerce platforms, the promotion focus of baby constant temperature sleeping bags is "Outlast technology", and the goals are "NASA spacesuit patent technology" and "German constant temperature black technology".
Some brands of constant temperature sleeping bags don't use outlet, but they will use some specious words to describe consumers as outlet, such as adding "the same type" in front, but the effect is not good.
In addition, with the increasing popularity of temperature-regulating clothing by consumers, various new types of temperature-regulating fibers emerge in an endless stream and are also applied to baby sleeping bags.
According to the declared temperature control technology, the types of temperature control fibers and the sales volume of e-commerce platform, the following four constant-temperature sleeping bags were selected as the samples for this evaluation.
Combined with the questionnaire survey issued before the evaluation of Xiaohonghua, this sampling is a split-leg sleeping bag suitable for babies aged 6 months to 3 years, with a length of 80cm and a medium-thick model.