The Safe Sleep Simple Swaddle is recommended for babies 0 - 3 months and weighing up to 16.5 pounds. Itís cozy comfort keeps baby feeling snug and secure for a good night's sleep. It keeps baby safely covered and warm without loose blankets, and the Bottom Up zipper allows for easy changing without waking baby. Swaddle instructions are included. The Simple Swaddle is made of 100% cotton. Care instructions: close all fasteners and zippers before washing, machine wash warm in gentle cycle with like colors, use only NON-chlorine bleach when needed, tumble dry low. Do NOT wash with delicate fabrics and do NOT iron.