Good Inlet but 15 °? Still good.

The specified temperature of 15 degrees is a bit exaggerated or true only in really perfect conditions is clear. But 10 degrees all times there.
I use him as an Inlet for a sleeping bag that cost only half of Reactors Extreme. The Komfortemperatur my sleeping bag is indicated by 5 degrees but already at 10 degrees outside I freeze like a tailor. So buy the Inlet and the same tested. Yesterday, the temperatures went down to 3 degrees in the Bavarian Forest. And what can I say: It was really warm. No freezing, no tremor. Of course, you can feel the cold, not only in the breath of cold but no trace. It was even twice in the night I woke up because it was too hot and was sweating.
I am very excited, would buy him in there again and recommend. He is very pleasant and cozy on the skin and you can easily wash it as a sleeping bag. But he is so small and light he pimps the sleeping bag on outstanding example.