Some of these wraps are knitted style fabric so they have the look of a knit but still with plenty of stretch. We would use these as an outer layer before placing baby into a prop such as a crate, bowl or bucket. Some are limited edition stretch wraps but still with plenty of stretch. We do have limited supply of each colour. They are simple to use with so much stretch that you can wrap, tie & drape these wraps over many of the poses you will see in newborn baby photography.