The blank mask and 1 to 3 color repeat printed mask is 100% cotton. The fabric is not pre-shrunk.
It may shrink if dried or washed in extreme heat.
CENTER FOR DISEASE CONTROL (CDC) ADVISORY
CDC recommends wearing cloth face coverings in public settings where other social distancing measures are difficult to maintain (e.g., grocery stores and pharmacies) especially in areas of significant community-based transmission. CDC says face covers should be routinely washed depending on the frequency of use, and that machine washing should suffice in properly cleaning a face cover.