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Lenni Long-Sleeve Shirt - Men's

5 out of 5 stars
1 Review

Out of Stock

Don't worry though, we have a lot more Men's Button-Down Long-Sleeve Shirts in stock than that.

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Why We Like The Lenni Long-Sleeve Shirt

Explore nature in style with the Mammut Lenni Long-Sleeve Shirt. It offers the classic look of a flannel, but is built with a lightweight and packable fabric that keeps you comfortable when hiking and stows easily on camping trips. The fabric also wicks sweat and dries quickly for cool comfort when the sun is beating down, and it sports a FreshTech treatment to limit weird odors over the course of a long weekend in the woods.


  • Flannel styling meets active outdoor performance in this sirt
  • Light, quick-drying, and packable fabric adds comfort
  • Polygiene anti-odor treatment keeps funky smells at bay
  • UPF 30+ sun protection shields skin from sun
  • Item #MAM01AL
68% polyester, 32% nylon
1 chest
yes, Polygiene
UPF Rating
Claimed Weight
Manufacturer Warranty
2 years

Overall Rating

5 based on 1 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 0 reviews
4 Stars - 0 reviews
5 Stars - 1 reviews

Fits True To Size

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Runs smallTrue to sizeRuns large


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5 out of 5 stars

August 7, 2020

I love it

I've used it several times

I bought this shirt to wear outside for work when I need to look decent but also need to stay comfortable. The cut is semi-fitted, so if you're a big guy you should size up. I found that this fit me really well, breathes and looks great.

Egan O

Originally reviewed on Backcountry.com