DESIGNED TO BE SAFE – The elastic loop is strapped around the crib bars, it pulls enough on the cloud section to create a slight cantilever effect leaving the device standing semi-horizontal at about 6” above the mattress like a stiff flag on a pole, instead of it hanging down and flopping around where the baby will constantly try to bite it or wrap it around themselves. The main body is breathable to avoid suffocation. | CHILD SAFETY CERTIFIED – This product complies with EN71 (EU), ASTM and CPSIA (USA) Child Safety Standards. ALWAYS TO BE USED UNDER ADULT SUPERVISION. | ELASTIC ENOUGH TO ALLOW MOVEMENT – It has just the right amount of elasticity to allow a lot of free movement and to avoid sudden jerk and clips tearing out when the baby tries to roll, but not enough to allow baby to roll over. | EASY TO USE IN ANY CRIB – The device will be installed on the two sides of the crib, around the crib bars, wrapping each product around the bar and passing clip and cloud through the elastic loop, and clipping the clouds below the hip area as shown in the instructions, out of reach of the child's hands. To secure the product to the sleeping sack, fold its fabric as thick as possible to be .25" to .35 (6.5mm to 8.5mm). | FIBRE CONTENT – Body 100% Polyester, Elastic Webbing 70% Nylon, 30% Spandex, Grosgrain Ribbon 100% Nylon. Please note: Sleep sack not included. Babies should be supervised when using the product.