The Duo Diaper is a pocket diaper, and comes with our specialty Thirsties Duo Insert. The insert snaps together, forming a loop, making it much easier to wash and dry. The best thing is that the insert agitates out in the wash. No pulling out dirty inserts with your hands! To see photos and more information on the Duo Diaper, please visit this page on our website. The Duo Wrap is a cover. You will need to purchase a diaper or insert for absorbency to use inside the Duo Wrap. To see photos and more information on the Duo Wrap, please visit this page on our website. The Duo Diaper and Duo Wrap look exactly alike from the outside. They both have an adjustable rise, and are a trimmer option. These are a preferred choice for thinner babies. Please note, that our sizing is general, and each baby will be different. Please check your baby’s measurements to determine which size they should be wearing: http://www.thirstiesbaby.com/customer-center/size-chart/.