[Ideal for Baby's Sleep]: Our 0.5 tog sleep sacks use rayon from Bamboo, which is buttery soft, hypoallergenic, thermal regulating and sustainable. [Easy to Use & Care]: 2-Way Premium Zipper J-Shaped opens flat fully or unzips the lower half for quicker diaper changes and line drying. Our wearable blanket baby is Machine Washable. [Roomy & Longer Wear]: Extra Leg Room for kicking (hip healthy) and room to grow, but cannot be kicked off. Keeps your baby cozy all year round. [Safety above All]: Zipper garage to protect baby's face from chafing. Arm and Neck Openings sized with latest research. Fabric and filling rigorously tested against 1,000+ substances for top safety. [Great Idea for Baby Shower]: This sleep bag with superior quality, unisex color makes it a great idea for every little girl or boy. S for newborns (0-6 months), M for infants (6-18 months), and L for toddlers (18-36 months, 2T-3T). 0.5 Tog Sleep Sacks