Skip to content

Welcome to our store

  • Home
  • Catalog
  • Contact
Log in

Country/region

  • Canada CAD $
  • Sweden SEK kr
  • United States USD $
  • Instagram

Critical Mass Clothing

  • Home
  • Catalog
  • Contact

Country/region

  • Canada CAD $
  • Sweden SEK kr
  • United States USD $
Log in Cart

Item added to your cart

View cart

Collections

  • Fueled by U-235 and Spite

    Fueled by U-235 and Spite

    Let the world know what really keeps you going — U-235 and...

    Fueled by U-235 and Spite

  • Half life crisis

    Half life crisis

    Some atoms decay quietly. Others buy a convertible and speed off into...

    Half life crisis

  • Just a little bit of radiation

    Just a little bit of radiation

    Yes, bananas are radioactive — and now your shirt can be too...

    Just a little bit of radiation

  • Boiling rocks with magic

    Boiling rocks with magic

    This minimalist tee turns nuclear energy into iconic humor.It features a classic...

    Boiling rocks with magic

  • Radiate Positivity

    Radiate Positivity

    Because life’s too short to be ionizing.This shirt is your daily reminder...

    Radiate Positivity

  • Half-life, Full Struggle

    Half-life, Full Struggle

    Even uranium has its rough mornings. This “Half-Life, Full Struggle” tee features...

    Half-life, Full Struggle

  • Fashionably late

    Fashionably late

    Fashionably Late – The Delayed Neutron Some particles burst in right away....

    Fashionably late

  • Yellowcake

    Yellowcake

    Refined, enriched, and unmistakably thick. Whether you're splitting atoms or turning heads...

    Yellowcake

  • Glowing since day one

    Glowing since day one

    Some people burn out. Nuclear engineers? We glow. Whether you were born...

    Glowing since day one

  • Glowing since finals

    Glowing since finals

    Finals are over. The radiation never ends. Celebrate surviving the meltdown with...

    Glowing since finals

  • Will work for Isotopes

    Will work for Isotopes

    Desperate times call for neutron-rich measures. Whether you're a grad student, lab...

    Will work for Isotopes

  • Decay happens

    Decay happens

    Falling apart? Yeah, same here. But we’re holding it together — more...

    Decay happens

give me a happy blue nuclear background that says thanks for visiting

Subscribe to our emails

  • Instagram

Country/region

  • Canada CAD $
  • Sweden SEK kr
  • United States USD $
Payment methods
  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa
© 2025, Critical Mass Clothing Powered by Shopify
  • Privacy policy
  • Choosing a selection results in a full page refresh.
  • Opens in a new window.