The SWADDLE UP ECOVERO is made from luxuriously soft, stretchy & comfortable LENZING ECOVERO which offers eco-responsible viscose fibres with low environmental impact. The naturally temperature regulating fabric is ideal for moderate climates. The first step to achieving deeper sleep is our Love to Dream Swaddle Up, the award-winning baby swaddle that keeps your little one's arms in a more natural upward position, with a hip-healthy design and helps prevent night-time waking from your baby's natural startle reflex. The unique ARMS UP design of SWADDLE UP replicates your baby's behaviour in the womb, allowing the natural ARMS UP position & allows them to place their hands to the mouth for true SELF-SOOTHING . For best fit result please select size according to your child's weight, not their height or age. You must stop using SWADDLE UP ️ when your baby shows signs of trying to roll & transition to SWADDLE UP ️ TRANSITION BAG or SUIT.