Single 100% cotton muslin double-layer swaddling blanket. The fabric's light, open weave allows a baby's body temperature to regulate itself naturally which helps to prevent overheating. The double layer of muslin helps make baby comfortably warm on cold nights & brisk walks through the park. The more you wash aden + anais wraps, the softer they get. aden + anais wraps are extra large, measuring 47" x 47", so that new & seasoned mums alike can swaddle babies of all sizes with ease. Traditionally used for swaddling these wraps can also be used as burp cloths, nursing & pram covers, portable crib sheets, stroller & car seat liners, tummy time blankets, change table covers, & more.