Malabar Baby Handmade Sleep Sacks provide a safer sleeping environment for infants, offering a secure and cozy alternative to traditional blankets in the crib. Highly recommended by pediatric sleep consultants and parents worldwide.Please follow our size chart to get the perfect fit for baby. Don't forget to measure your baby's length (Chin to Toes) before purchasing for the best fit. Lightweight - Tog 0.6 (Lightweight and ideal for tropical climates)Recommended room temp 70-80°F / 21-27°CSmall: Fits newborns-babies 6 months | 7-18(lbs) / 3-8(kg)Medium: Fits babies 6-18 months | 16-26(lbs) / 7-12(kg)Large: Fits babies 18-36 months | 25-35(lbs) / 11-16(kg)Extra Large: Fits babies and toddlers from 36-48 months | 34-45(lbs) / 15-20(kg)