The sleeping systems of Alvi are unsurpassed, in my opinion. The child can sleep comfortable in all weather conditions, is neither cool nor overheated. Of course you have to pay it, what you put on the baby under the sleeping bag) The first sleeping bag Gr. 50/56 held in our 12 weeks. The next 62/68 hopefully back for so long. Despite every 3 days Washing Machine at 40-60 ° with sensitive detergent and fabric softener and then dry the condenser of the first sleeping bag for a daily use for 12 weeks is still in good condition and has no flaws. The slightly higher price compared to other sleeping bags in my opinion is more than justified, and an investment value.