Calculation Face Mask


Let your inner mathematician show off a little when you don this all-cotton, triple-layer face mask with its complex calculations on light blue.

Thoughtfully designed here in Vermont, with fabric patterns chosen to suit whatever mood you may be in - not to mention whatever outfit you may have on – all of our masks feature:

  • Blocks up to 99% of all airborne particles (with filter)
  • 3 layers of 100% cotton
  • Filters sold separately here
  • Ample coverage of nose and chin
  • Flexible nose wire
  • 500+ thread count
  • Adjustable elastic earpieces
  • Interior filter pocket
  • Don’t forget your Refresher Mask Spray
  • Over-The-Head Face Mask styles found here
  • Lanyards and Ear Saver Headbands sold separately.
  • Unless sold out, masks are offered in Adult, XL and child sizes
  • Adult fits most (not all) women and XL fits most (not all) men
  • Tell the world you’re vaccinated with our Silicone Bracelets

Sorry, face masks may not be returned or exchanged.

Size Guide

Customer Reviews

Based on 140 reviews
Geraldine Butler

Fits great! Secure and looks good!

Joanna deFelice
His favorite!

Great fit, comfortable, fun design. This was a repeat order, so I know he liked it.

Kay G.
Thumbs up!

This mask was a big hit. I bought it as a gift for a coworker who is an 8th-grade math teacher. She absolutely loved it.

Carmen Rivera
Great quality

I've bought 6 masks and found them all to be of great quality and fit nicely. I've given a couple of them as gifts as well and the recipients are also happy with them.

Great mask....almost perfect

I love that these masks are 3 layer cotton with an area for filters. The youth size fits my average size 8 year old really well. My only complaint is that I wish they had a bead (or even a knot) on the ear loop to prevent the slider from coming off.