Cool Mesh Fabric: Constructed from a soft, lightweight mesh fabric that promotes air circulation around the baby, ensuring a cool and constant body temperature during warm nights. Transition from Swaddle: Facilitates a smooth transition from swaddling to free arms without disrupting the baby's sleep. Safe for infants who have begun rolling onto their tummy during sleep, allowing them to move their arms into their preferred position. Unrestricted Arm Movement: The Sleepy Hugs Original provides unrestricted arm movement while sleeping, offering security to calm the startle reflex without restricting the baby's movements. Features: Full-body length zipper with top zipper cover and a long zip along the bottom for easy middle-of-the-night nappy changes. Hip-friendly wide sack design that comfortably accommodates a hip dysplasia brace, ensuring comfort and safety for babies with hip dysplasia. Size: Specifically designed for newborns up to 3 months old, ensuring a snug and secure fit for the smallest of infants. Overall, the Baby Loves Sleep Sleepy Hugs 'Cool' sleep suit offers a comfortable and safe solution for newborns during warm summer nights, aiding in the transition from swaddling to free arms while providing essential features for convenience and customization.