Natural bamboo fiber provides excellent absorption and comfort. Unlike other brands, KaWaii Baby Bamboo insert is 100% bamboo; there's no microfiber or fleece inside. 4 layers of bamboo that provide more absorbency. Place the insert on top of the diaper against the baby's bottom or place the insert inside the pocket to absorb moisture. Suitable for babies with sensitive skin. Bamboo is Eco-friendly, hypoallergenic, thermal regulating, absorbent, breathable, and antibacterial. Bamboo is naturally resistant to bacteria, odor and mildew. Bamboo inserts will maintain their special qualities when washed in cold to warm water with a gentle detergent, free of bleach. Line drying in the sun is the best, if possible. Machine drying in low to medium heat. Size: Medium, approximately 11 x 5 inches (27.9 x 12.7 cm); pair with newborn diaper (6-22 lb)