How can I design my own custom apparel online?

Explore our user-friendly design tools and create custom clothing straight from your browser. In just a few steps you can get a quote and place your order. Or you can reach out to us at help@undergroundshirts.com for more help.

What types of custom clothing can I create?

At Underground Printing, we offer a wide variety of products available for customization, all the way from custom t-shirts and hoodies to custom hats and accessories .

Can I get bulk discounts for custom apparel?

Ordering custom shirts or apparel in bulk will give you the best cost per item. The cost of custom apparel depends on the type of garment chosen, the quantity of garments chosen, the number of print colors, and the print method.

Do you offer returns or exchanges?

Absolutely! If you are not happy with your order, we will assist you accordingly. Whether that be a full refund or a reprint of your order. At Underground Printing, we proudly offer a 100% Satisfaction Guarantee.

Browse Our Catalog

1350 College Ave, Unit 120 • Boulder, CO

Custom T-Shirt Printing in Boulder, CO

Quality Custom Apparel Services in Boulder, CO

Our Boulder store is located in the heart of University Hill, just steps from the University of Colorado Boulder campus. Surrounded by local favorites like Starbucks, Glo Tanning, and College Optical, it's the perfect spot to drop in while exploring the vibrant neighborhood.
We specialize in custom t-shirts, sweatshirts, hats, and more—with screen printing, embroidery, and no minimums. Whether you're part of a student organization, a local business, or planning an event, we're here to help you create something awesome.
Come visit us to get started on your custom project—or schedule an appointment online!

Underground Printing
1350 College Ave
Unit 120
Boulder, CO 80302
Map & Directions

Phone: 303-418-4965
Email: ugpbld@undergroundshirts.com

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9:00AM - 5:00PM

Closed

Store Staff

Walk-in or schedule an appointment — come see our apparel up close and talk to our friendly staff.

Parking

Metered street parking is available nearby, and several public parking garages are just a short walk away.

Browse Our Catalog

Explore our wide range of customizable apparel and merchandise, perfect for teams, events, businesses, and more. Whether you're looking for t-shirts, hoodies, hats, or promotional products, our catalog oers high-quality options to fit every style and budget!

Build Your Group Order

Kick off your custom apparel project with ease! Our group order platform makes it simple to design, organize, and collect orders from your team, organization, or event participants. No need to chase down sizes or payments — we handle everything for you. Get started today and bring your group's vision to life!

Start Your Design

Bring your ideas to life with our easy-to-use Design Studio! Customize apparel and accessories with your own artwork, text, or logos—or choose from our library of graphics and fonts. Whether you're creating something for fun or for your next big event, our Design Studio gives you the tools to make it uniquely yours.

Underground Printing - Since 2001

Colorado Buffaloes Merchandise

Show your Buffaloes pride with our exclusive collection of officially licensed University of Colorado fan gear, including authentic t-shirts, sweatshirts, hoodies, and more! Whether you're cheering for Colorado Football, Basketball, or Lacrosse, we offer a wide range of apparel for every sport and fan. Discover the latest Colorado Buffaloes Big 12 apparel and merchandise at UGP Campus Apparel by Underground Printing.

Shop Collegiate

Customer Reviews

"Super communicative and got our tshirts in a time crunch! Amazing quality too!"

"Brian was incredibly helpful in setting up our organization "pop up shop", he was always responsive, very flexible and always had answers. Setting up the shop itself is free (no additional cost than the cost of the shirts) and easy to organize for our folks ordering shirts."

"Underground Printing was easy to work with for this order! I especially appreciated working with Brian, who helped me troubleshoot the best way to set up merch sales for our small business' needs."