Flume 1/4 Zip Baselayer - Men's


Size Guide


Named the overall best hiking shirt by Field and Stream in 2021 and 2023, the Flume is a blend of Tencel (made from trees!) and spandex.  Tencel is naturally wicking, naturally odor resistant, thermo-regulating, and crazy comfortable. The ¼ zip adds a bit of style for your après hike or ski activities ensuring comfort on the mountain and style at the watering hole.

40 UPF.

Men's Flume Crewneck

Women's Flume 1/4 Zip

Women's Flume Crewneck

Weight in ounces:
XS: 7.0
S: 7.4
M: 8.1
L: 8.7
LT 9.2
XL: 9.8
XLT 10.2
XXL: 10.4

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

4 way stretch fabric for superior movement and fit
Extended length to ensure coverage when active - no more exposed lower back!
¼ zip for better venting when required
Thumb loops for secure hand coverage - layering warmth when you need it!
Raglan sleeves for greater movement
Flatlock stitched to reduce chafing - smooth and comfortable on your skin!

Fabric: Texollini, Long Beach, CA; 91% Tencel, 9% Lycra
Zippers: YKK, Macon, GA

Machine Wash Cold with like colors, gentle cycle
Do not dry clean
Do not bleach
Tumble dry low or lay flat to dry 

Customer Reviews

Based on 170 reviews
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.

Jeremy D. (Watertown, US)

My new favorite baselayer! It's the most comfortable one I own, keeps me warm and dries quickly.

Bill W. (San Francisco, US)

This is a well made garment but it is too loose for a base layer. I use this when I play golf and it would keep more heat in if it were tighter. I have a lot of Uniglo heattech and they fit great.

Mark B. (Wilmington, US)

I was underwhelmed by the product. Amazing how many people rave about this pullover but although soft and comfortable it was too thin, not warm at all and the price point is higher than I would pay again for this.

karen f. (Hollis, US)
incredible product

I bought one for my usually cold husband for Christmas..he loved it!! so I bought 2 more ( already gave him the red one, which was a valentine's gift)