There is another aspect of Kavka’s construction which allows such small babies to be worn in it comfortably. Same as Fidella, it has two pairs of buckles on the back panel to which the shoulder straps can be attached: the lower ones are placed just above the waist belt and are meant to be used for smaller wearies approximately to the size of 74, the upper pair is placed on the sides of the back panel as usual and meant for bigger children. The idle pair of buckles hinders a little bit, to be honest, but I cannot dispute their function in this particular carrier. Therefore I cannot reproach this and think of it more as an aesthetic matter (moreover, it is possible to hide the idle buckles into the back panel 😉 ).
Vertically, the back panel is adjusted by straps – nothing new, but is is foolproof and well-functional.