2.5 TOG sleeping bag. Pear-shaped, grow-with-me outer bag with a continuous zipper. Offers plenty of kicking freedom due to the special shape of the outer bag. Neck and arm openings adjustable via a button system. Developed in years of collaboration with doctors and nursing staff. Independent midwives have tested the ALVI Baby-Mäxchen and recommend it to parents 100%. Winner of the Germany Test by FOCUS magazine in the baby sleeping bag segment. Tested for harmful substances according to the strict guidelines of the globally recognized OEKO-TEX Standard 100. Rule of thumb: Body length - head length + 10 cm = ideal Mäxchen size.