What the Fluff?
A Tribute to Union Square Invention

2026 Vendor Application

Saturday, September 19, 2026
(Severe Weather Date Sunday, 9/20)
1pm to 5pm
 

What is the Fluff Festival?

"What the Fluff? A Tribute to Union Square Invention,” a nationally recognized and locally beloved street festival, returns for its 21st year. This year’s theme Legally Fluff: A Toast to Union Square invites Fluff fans from far and wide to raise a glass of their favorite bubbly bev to celebrate Somerville’s signature sweet spread in style.

Who should apply?

All food, craft, and art vendors are encouraged to apply!

Vendors are jury selected for fit, variety, and potential for success.

TIP: Fluff and Somerville themed products and specials strongly encouraged.

**Please note that application does not guarantee acceptance to the Festival. Vendors will be selected based on quality, creativity, product variety, appropriateness to the event, and space availability.

Festival organizers also reserve the right as sole purveyor at the Festival of fluffernutter sandwiches.

Questions?

Contact us with questions! vending@unionsquaremain.org.