Free US Shipping on orders over $75.

№ 88 Radium Romper

№ 88 Radium Romper


To pay homage to the building blocks of all matter and Dmitri Mendeleev’s masterpiece, The Periodic Table of Elements, Theory Tot presents our Elements collection.

Radium is a highly radioactive element that was first discovered by Marie Curie and Pierre Curie in 1898. All of Curie’s papers are still so radioactive, they are too dangerous to handle and are kept in lead-lined boxes!

This cute elemental number is the perfect attire for the up-and-coming tiny scientist, it’s soft and comfortable, but durable enough to withstand any scientific expedition, no matter how messy.

These rompers are designed with parents in mind with an easy on-and-off neckband for speedy outfit changes and snaps for easy diaper change access or quick opening for toddlers that need to go NOW!

Each design is printed using eco-friendly water based inks onto rompers made in the USA, sweatshop free, by American Apparel. The placement of the graphic will vary depending on the romper size you order.



Fabric 100% fine ring-spun combed cotton
Shrinkage will shrink an average of one size when put in the dryer
Gender neutral

Baby Size Chart

Theory tot baby size chart 22312905e357ec0caf0d6107ffd0183a1ba0e650f3fedd1eb2c72f86e9959a14