This is a contour diaper with elastic in the legs for added protection against leaks. This terry cloth is made from 100% organic cotton for maximum absorbency. Other benefits to this organic terry diaper include quick drying time and it less bulky than some of the other terry cloth diapers on the market. It is a one-size diaper; so it will last from birth to potty. This is great for daytime, nighttime and heavy wetters. It works with any diaper cover and because of the generous wings, there is no need for pins.