"We went from waking every 2-3 hours to getting 5-6 hour stints overnight.” – Sarah K. Design Concept About Size Fabric Details & Care Safety Scientifically designed for self-soothing and sounder sleep. The gently weighted Zen One calms like your embrace by providing comforting pressure only where babies are naturally held. This secure feeling eases the womb to world transition and helps babies self-soothe through sleep disruptions, leading to deeper periods of sleep that are essential for healthy development The gently weighted Swaddle echoes your reassuring touch on baby’s chest and sides, so your little one always feels comforted and secure, like in your embrace! - Helps them sleep through the Moro reflex. - Can be wrapped with arms-in or out - Eases swaddle-transition to the Zen Sack One size:- Age: 0-6 months - Weight: 7-18 lbs / 3.2-8.2 kgs - Height: 19-28 inches / 48-71 cms * When determining which size is best for your baby, look at the minimum weight, and the maximum height. Your baby should not be below the minimum weight, but they should have at least 2 inches to grow into the maximum height. Fabric details:- Made from 70% rayon from bamboo for luxurious softness and 30% cotton for strength- Light-weight fabric, perfect for warmer climates- Bamboo is naturally anti-microbial and moisture wicking for dry, clean comfort- TOG 1.0 Care details:- Wash in cold water on delicate cycle- Tumble dry on low heat The center and side weights mimic your reassuring embrace and calm with only a few ounces ▪ The safe alternative to all-weighted sleepwear ▪ Applies gentle pressure that is tested for breathing safety ▪ Passes mandatory and voluntary children's product tests ▪ Tested for suffocation hazard, pulmonologist verified ▪ Hip-healthy. Does not hinder mobility