Theorum Face Mask


Maybe you can calculate each of the white equations that appear on this brick-red face mask. We sure can't!

Carefully designed and sewn, each mask features:

  • 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 45 reviews
Rochelle Dunning

I bought this for my 6 yo who loves math. He loves it and delighted that no one has the same mask at school. He said "good fit and comfortable". I only buy Beau Ties masks.

Lisa Preston
It all adds up!

I bought this mask as a gift for a student who's a math whiz and she immediately set off to check the work! Each student received a different mask and they all love the style and fit. Thank you!

Margaret Mucci

These masks are very comfortable - adjustable ear loops make them fit just right - and the fabrics are lovely. I love that they have a pocket for a filter. Also, the different sizes available make for a better fit. This one was a gift for my math teacher daughter and she loved it!

Gladys Trzcinski

I ordered this mask for my friend who is a retired math teacher. She was delighted with it, even sent me a hand written thank you note! Great masks, they fit very comfortably and are a real attention getter.

Jane Clarke
Great Fit

I now have 4 BeauTies masks, they fit my face comfortably, even the straps over my ears and when worn over a KN95.