Gently used MEDIUM transitional zip swaddle. Medium is for 13-19 pounds. The arms are removable for when your baby begins to roll, but still have the security and comfort of their familiar swaddle. This thing saved our sleep, and sanity, when dealing with the witching hour and colicky baby. Details Material: 93% Cotton, 7% Elastane Gentler way to help your baby transition from swaddling to arms-free sleep with patented zip-off wings. Converts to a snug sleeping bag, maintaining the secure feeling of being swaddled. Twin zipper for easy diaper changes. Easy Care: machine wash on gentle, tumble dry on low. 1.0 TOG fabric is ideal for moderate room temperatures between 68°F and 75°F Certified 'hip-healthy' by the International Hip Dysplasia Institute allows recommended flexion for hips & legs. Proudly supporting First Candle & SIDS research.