Scrub Caps, Scrunchies, Masks, Charms and vests

What are your scrub caps made of? Will your Tie Back Scrub Cap cover long hair, and how do I put it on? How do I put on a Ponytail Scrub Cap? How do I wash my scrub cap? What are your scrunchies made of and how do I care for them? How does the 3 for 2 scrunchie deal work? Are your face masks medical grade? How often should I change the PM2.5 filter in my mask? Tell me about your stethoscope charms. What is the Featherlight 50 Down Puffer Vest made of and how do I care for it?