Barely used I had two of this size and this was just backup. Pet free smoke free home. Gentle weight is located on the front (or top) of the sack only and is not intended to restrict movement. This sleep sack is a 1.0 TOG, perfect for 68-73°F or 21-23°C Designed in collaboration with pediatricians, NICU nurses and certified sleep consultants Reviewed by pediatric pulmonologist for breathing safety Inner beads are non-toxic, BPA free For safety reasons, we do not recommend sizing up Questions? Leave a comment below!