As we are always looking for the "right" for our daughter, we have the "slumber bag" can not say no. The breathable fabric blend (outer fabric and lining made of pure cotton and in between a polyester fleece - padding) ensures a good night's sleep. As soon as you lay down our daughter we realize that it is much more balanced, than traditional "stuff sacks". At room temperature, we must pay attention not that of the thermometer about 20/21 ° increases. By Tog - System (measure of the heat resistance of textiles), it may be from 21 ° uncomfortable (Tog 2.5 = 15-21 °). In spring and summer, he will probably not be very suitable. (In mid-summer, we often from 26 ° in the house). To change we equal to appoint a second slumber bag and currently come well over the rounds. The only point of criticism concerns the zipper - very fiddly and strictly close. Conclusion: A sleeping bag for most of the year, in a very good quality. Dries quickly and keeps the colors. Very good quality for little money.