Material: 100% cotton or bamboo with 1/4 inch elastic for the ear pieces.
Sizes: Adults & Children - one size fits most (if you have a special size request, let me know in the comments)
Filter: There is an option for you to purchase a mask with a slit to include a filter inside. (Filter is not included.) The basic version does not have a slit for a filter.
I can take some color requests, however, all the masks are different and fun. Many people choose to be surprised with the colors they receive.
Care instructions: Machine Wash in COLD water, hang to dry or tumble on LOW