Collection: Triangle Threads: The OG Brand
Before Isle & Glen, there was Triangle Threads, where our family got its start designing shirts for national parks, the outdoors and the places we love to explore. Along the way, our Irish and Scottish designs became the heart of what we do and grew into Isle & Glen. These are the original designs that started it all.
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Dry Tortugas National Park "Big and Bold"
Regular price $34.99Regular price$39.99Sale price $34.99 -
Theodore Roosevelt Medallion
Regular price $34.99Regular price$39.99Sale price $34.99 -
Rocky Mountain Vintage Sketch
Regular price $34.99Regular price$39.99Sale price $34.99 -
Slow Hiking Society
Regular price $34.99Regular price$39.99Sale price $34.99 -
Lift Snowboard
Regular price $46.99Regular price$54.99Sale price $46.99 -
Breckenridge "80's Retro"
Regular price $34.99Regular price$39.99Sale price $34.99 -
I'm Difficult "Black Diamond" Ski
Regular price $44.99Regular price$52.99Sale price $44.99 -
Greetings From Sleepy Hollow
Regular price $34.99Regular price$39.99Sale price $34.99 -
Cottagecore Birds "Folk Art Print"
Regular price $44.99Regular price$52.99Sale price $44.99 -
Columbia River Gorge "Big and Bold"
Regular price $34.99Regular price$39.99Sale price $34.99 -
Badlands Medallion
Regular price $34.99Regular price$39.99Sale price $34.99 -
Sorry Snowboarding
Regular price $46.99Regular price$54.99Sale price $46.99 -
Banff National Park Groovy Screenprint
Regular price $34.99Regular price$39.99Sale price $34.99 -
Glacier National Park "Vintage Sunset"
Regular price $46.99Regular price$54.99Sale price $46.99 -
Mount Rainier National Park "Wildflowers"
Regular price $44.99Regular price$52.99Sale price $44.99 -
West Virginia Mountain State "Big and Bold"
Regular price $34.99Regular price$39.99Sale price $34.99
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Frequently Asked Questions
Where are you based?
We're Chris and Rachel, a small family brand in Raleigh, North Carolina — halfway between the Blue Ridge Mountains and the Atlantic Coast. We design every shirt in-house, and we print with trusted partners here in the USA to get your order out fast.
Are Triangle Threads and Isle & Glen the same?
Yes — same company, same two people, same shop. Isle & Glen is simply the new name.
Triangle Threads is where we started. We began by designing shirts for America’s National Parks and the wild places we love to explore.
Ireland and Scotland were always our other great passion, and somewhere along the way that passion took over and became the full-time thing. Isle & Glen grew out of it.
So if you spot Triangle Threads on a package, an email, or somewhere on this site — that’s still us. Same family, same care, same shop. Just a name that finally matches what we love making most.
How long until my order arrives?
We know you're used to two-day Prime, but every shirt is printed to order just for you — so it's worth the small wait. Orders usually ship within a few business days, and once yours is on its way, delivery takes another 3-5 business days. Most land on your doorstep within a week.
Shipping is always free on orders over $75. You'll get an email with a tracking number as soon as it ships, so you can follow it all the way to your door.
Can I change or cancel my order?
Yes, within 24 hours of placing it. Every shirt is printed to order, so after that it's usually already in production. Just email us at support@isleandglen.co with your order number and what you'd like to change.
Do you ship internationally?
Not yet — we currently ship within the United States only. We'd love to bring Isle & Glen overseas down the road, so keep an eye out.
What size should I get?
Sizing can be tricky, so there's a full measurements chart on every product page. Because Comfort Colors are garment-dyed and preshrunk, we recommend sizing up if you're between sizes or just prefer a roomier, lived-in fit. Tees come in S–4XL, long sleeves in S–3XL, and sweatshirts and hoodies in S–5XL.
What are the shirts made of?
We print on Comfort Colors 1717 — the heavyweight, garment-dyed, 100% ring-spun cotton tee that's considered the gold standard for vintage-feel shirts. Soft from day one, preshrunk, and made to get better with every wear.
How do I return or replace something?
If anything arrives damaged, defective, or just not quite right, reach out within 30 days and we'll make it right — no questions asked. Email us at support@isleandglen.co with your order number and a photo, and we'll take care of you with a replacement or a refund.
How do I get in touch?
Email us at support@isleandglen.co or use our contact page. We reply within 24 hours, and usually within 12.















