There are no zippers, no velcro or snaps. Swaddle size is 35"by 35". Headbands are 25" long. Swaddles and headbands are made of a Cotton and Spandex blend, they are soft and stretchable. Machine washable Our blanket is made out of a lightweight fabric and is wonderful for warmer summer months For every item sold, one headband is given to a child with cancer.