2 layers of cotton velour and 4 inner layers of bamboo terry. Our bamboo terry is super absorbent and flexible so baby can freely move. In a contour shape for a better fit and trimmed with awj to keep from baconing. 5.4 x 14 inches Our bamboo terry is made off 70% bamboo and 30% cotton. Each layer is 280 gsm our cotton velour is 340 gsm