Actual contour lines. Actual terrain.
The Bob Marshall Wilderness Sky Blue Long Sleeve Performance Tee
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Adult sizes from Small through 5XL. Yours is here.
Let customers speak for us
Gave this as a gift and she loved it!! Her favorite park, and now a favorite shirt.
It's very comfortable and functional. I get two kinds of comments: that it looks nice and/or curiosity about the design. When I tell them what the topo map is from, they nod knowingly, as I grew up in Tacoma so I saw "the mountain" and visited on the regular as a child.
This is my favorite of my TrailBest shirts! I love Yosemite, so it's fun getting to wear a map of one of my favorite places. On top of that, the color is beautiful, the fit is great and the performance of the material is just what I expect for a shirt expected to go places and do things with me. Highly recommend!
My new favorite shirt of one of my favorite places. Well done
On top of reminding me of my visit to Yellowstone’s Grand Canyon, this hoodie is very comfortable and made with great quality. I would absolutely recommend and buy again.
Looking at more than one? We have 10% off any 2, 15% off any 3, and 20% off 4 or more.
📍 Designed in Chelsea, MI: Small, family-run support. Questions? Call us any time: 734-224-2223.
🪡 Custom Crafting: Cut and sewn strictly to order. Orders arrive in about 14 days.
🔁 Frictionless Returns: Just let us know if it's not perfect.
✈️ Reliable Air-Express: Bypassing global shipping delays.
The perfect gift for anyone who stopped to take it all in and ran out of words.💦🌞❄️ Performance Fabric
Long sleeve UPF 50+ performance shirts are perfect for days that start hot, get stormy, and end cold. Breathes well, wicks fast, and won’t stay wet. Light enough as a top, warm enough as a layer.
The Bob Marshall Wilderness stretches across western Montana in a vast expanse of rugged peaks, deep river valleys, and unbroken forest. Known simply as “The Bob,” it’s a place where trails run long, rivers run wild, and solitude is part of the experience. From the South Fork of the Flathead River to high mountain passes and remote alpine basins, the landscape feels untamed and expansive. This long-sleeve performance tee reflects that terrain, tracing the contours of winding trails, river corridors, and the backcountry routes that define one of the largest wilderness areas in the Lower 48. Anyone who’s ridden or hiked deep into the backcountry, crossed a cold river, or watched evening light settle over endless ridgelines will recognize the lines in this design.
Built for true backcountry conditions, the lightweight fabric manages heat on long days while providing coverage when weather shifts and wind moves through the valleys. UPF 50+ protection adds comfort during extended time in open terrain where exposure is constant. It’s a layer for people who know the Bob Marshall Wilderness isn’t about quick trips—it’s about distance, self-reliance, and time spent far from roads in a landscape that still feels truly wild.
Adult Long Sleeve Performance Tee Size Chart
|
Size
|
Chest (inches)
|
Length (inches)
|
Sleeve (inches) collar to cuff |
|---|---|---|---|
|
S
|
36
|
28 | 33.5 |
| M | 40 | 29 | 35 |
| L | 44 | 30 | 36.5 |
| XL | 48 | 31 | 38 |
| XXL | 52 | 32 | 39.5 |
| 3XL | 56 |
33
|
39.5 |
| 4XL | 60 |
34
|
40 |
| 5XL | 64 |
35
|
40.5 |
Here's an easy way to check your size:
1. Lay a favorite good-fitting shirt flat with buttons fastened.
2. Measure right edge to left edge of fabric under the sleeve to find half the of the chest circumference.
3. Double your measurement and match it to the chest measurement in the chart above.
Between sizes? Go to the next larger size - this shirt is intended to be a loose, comfortable shirt!
Product information
This is a lightweight, comfortable tee built for long days outside. It’s soft, breathable, and quick-drying, with a bit of stretch that makes it easy to move in. The fit runs a little generous, so the size guide will help you find what feels best.
The fabric is steady and durable, holds its color, and won’t shrink in the wash. It’s the kind of shirt you can wear on the trail, on the road, or anywhere you spend time outdoors.
Made from 95% polyester and 5% spandex, the material meets the highest ultraviolet protection rating under the AATCC TM 183 test. We can share the documentation if you ever want to take a look.
Our shirts are sewn by our trusted team in Vietnam and they understand the importance of quality and attention to detail. Each one is sewn to order within a couple of days, then shipped by air to the U.S. and handed off to USPS. Expect orders to arrive within 10 to 15 business days, though busy seasons can take a bit longer. We appreciate your patience. Making each shirt one at a time is part of how we keep things thoughtful.
This tee is easy to care for. Machine wash it on warm and tumble dry on a cool setting. The fabric dries fast, keeps its color, and holds its shape without shrinking. No ironing needed — just wash, dry, and it’s ready for your next day outside.
If you’ve been here, you’ll see it immediately. Most people won’t. That’s the point.
Real maps are the fabric of everything that we make.