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 157 reviews
Robert G. (Brighton, US)
Flume Crewneck Baselayer

Wore just the Flume Crewneck for my top last Saturday during Hurricane Lee on N & S Twin and I was fine!

Alison S. (Billerica, US)
LOVE this long sleeve T

My new favorite long-sleeve T. I would wear it every day if I could get away with it. Perfect for hiking, or for an extra (thin) layer when heading out to the gym or to run errands when the temps are questionable. The fit is terrific and the fabric is soft and high quality. It washes well and keeps its shape. Everything I could hope for in a versatile base layer long-sleeve T.

BG (Newport, US)
Beautiful new color, good fit

The new color, Aruba Blue, is beautiful. The fit was just right for my friend, to whom I gave this as a gift. It was a bit thinner than I expected, but could still be worn without another layer under it.

Kimberly (Plainfield, US)
Awesome piece

This shirt/base layer is extremely soft!! I've never had such a soft piece of clothing before. It's thin enough to breath in and yet thick enough to add some warmth. I love it so much, plus the aruba blue color is beautiful. Great quality!

Bill B. (Dover, US)
Great additon to wardrobe

I have 3 of these already and this is the best color yet!