(Quoted from Marhsal Atkinson from atkinsontshirt.com. Full article here.)
Tri-Blend.  Have you noticed that this style is dominating t-shirt sales lately?
Once upon a time in the decorated apparel industry, there used to be a name for those types of gray shirts. 
Heathers. 
Back in the day, there were really two choices for a heather gray shirt.
A lighter version, called Ash and the traditional gym class gray usually called Sport Gray, Oxford, Light Steel, or some other variation.
These days Tri-Blends come in a crazy multi-colored, heathered rainbow of colors. 
Like a bowl of t-shirt Skittles.  You can get just about any color you want.
The fabric, as the name suggests, comes in percentages of three sourced materials. Cotton and Polyester usually make up the largest portion, but there can also be Rayon or Modal to make up the third. 
And, for the sustainability-minded, fabric materials can be recycled or organic too.
But, we are not just talking about t-shirts either. There are hoodies, v-necks, raglans, henleys, pullovers, tanks, scoop-necks, wide-necks, color-blocked, and jersey shirts. 
It’s a big line-up.

Fun Fact: Upon searching the term “tri-blend” on the top three industry suppliers websites, 1,267 style numbers populate. That count would have been a fraction of that amount just a few years ago.

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