Baby sleeping bags Zips, press studs or ties? Baby sleeping bags have various opening and closing methods and can have sleeves for winter. Try them out to choose your favorite. For a newborn, press studs are more practical, but sleeves can prove hard to pull on. You will need at least two sleeping bags, so you always have a spare for when the other’s in the wash! See above: LAB–LA PETITE COLLECTION Organic cotton gauze sleeping bag 32