Flume Crewneck Baselayer - Men's


Size Guide


Named the Best Overall Hiking Shirt by Field and Stream in 2021, 2023, and 2024, the Flume consists of a blend of TENCEL™ and spandex. TENCEL™ is naturally wicking, odor-resistant, thermo-regulating, and exceptionally comfortable, making the Flume the perfect all-season baselayer.

40 UPF

Weight in ounces:
S: 7.2
M: 7.6
L: 8.0

LT: 8.6
XL: 9.0

XLT: 9.2
XXL: 9.4


Made in the USA:
Crafted in Lincoln, NH; Fall River, MA

4 way stretch for superior movement and fit
Extended length ensures coverage when active - no more exposed lower back!
Thumb loops for secure hand coverage
Raglan sleeves for superior movement
Flatlock stitched to reduce chafing - smooth on your skin
Made in the USA!
Texollini (Long Beach, CA)
91% TENCEL™, 9% Lycra

Wash with like colors
Machine Wash Cold
Gentle Cycle
Do not bleach
Lay flat or hang to dry

Sizing - the sizing for this product is mens

Customer Reviews

Based on 174 reviews
John M. (Quincy, US)
Excellent layering piece

This 1/4 zip is comfortable and versatile. I will use it both for golfing and early morning walking. Construction and fit are excellent.

Monique (Center Barnstead, US)

I love this shirt. It’s the perfect fit and thickness. For reference I’m 5’ and 120 lbs and have the xs. It’s not skin tight but fits loose, unlike the regular long sleeve style flume. My only issue with it is the seem on the arms. I can deal with it but wish it was covered better because it does feel a little itchy and goes from the armpit all the way down to the hands on both sides.

Michal M. (Brooklyn, US)
Best base layer!

This was my second flume 1/4 zip, loved the red one so much I had to get another in blue! These are super comfy, lightweight, and stretchy! I’ve used them as a baselayer for winter hikes in the White Mountains and as second layer for local runs, as well as for climbing on slightly chilly days. It really does it all! I like the that the thumb holes are nice for cold days in conjunction with gloves to lock in warmth, but aren’t so big that they feel breezy when you don’t use them. You can unzip and push the sleeves up if things get a bit warm to dump heat. They dry fairly quick too, and did I mention how comfy they are?! I’m usually smack between a small and medium but the small fits perfectly. I wish they were a bit cheaper, but the quality and price is on par with some of the other big-name clothing brands and I’d rather give my money to an independent, local company :)

Aly P. (Providence, US)
Great base layer and quality!

Perfect base layer for skiing, running, or everyday. The quality is great while still being light and keeps you warm. I have the granite gray color and it is neutral but also different. Also has thumb holes which is also a plus :) Will definitely be purchasing other colors!

G.H. (Bethlehem, US)
Looovvveeee it

LOVE this base layer!!! On the thinner side, but kept me warm on the slopes with the highlander hoodie over it. Extremely soft, extremely comfortable. I’m typically a medium or large, and went with a medium. Maybe size down if you are in between sizes.