Our best selling, no fuss onesie pajamas are designed to maintain the best sleeping temperature for baby. Sized for babies and toddlers from 3 months through 3T. Available in two weights of fabric, cozy Fleece, and naturally stretchy Rib Knit. Non slip soles ensure safety and mobility. Pair with an enclosed bottom sleeper bag or a sleeper bag for walkers for a complete, safe sleep system.