Lightweight and breathable swaddle bag light, supporting your baby's comfortable sleep. *Used a few times. Stored at home for about 3 years. No yellowing. Home cleaned. Please understand that this is a used item before purchasing. - Size: M (Weight: 6~8.5kg) - Material: 97% Polyester, 3% Polyurethane - TOG: 0.2 TOG Thank you for looking.