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Barfly Microshell Overpant


When riding fast and light during summer, it's tempting to ditch your rain layers for more breathable gear suited to the warm conditions. But even in the hot months, forecasts are unreliable, and conditions change unexpectedly. That's where the Barfly Microshell comes in.

Deployed, it's a lightweight, stretchy 3-layer overpant with 20K/20k waterproof breathability. When stashed away, it prioritizes pack space, fitting easily into your backpack or tail bag, so it's always there when you need it. Whether you are heading out for a day on the trails or an extended ADV trip, the Barfly Microshell is so compact and highly waterproof that you might ask yourself, "Why not bring it?"


At 635 grams (22.4oz), the Barfly Microshell 3L overpant is our lightest waterproof pant. It blends 2-way stretch 20D Stretch Nylon with 4-way 160D Stretch Nylon reinforced knees and lower leg to balance weight and packability with durability where it counts.

It is the perfect way to add waterproof protection and extend the performance range of our Woodman, Kiger, or Surveyor Pants (or any other non-waterproof pant). The full zip overpant design allows you to change as quickly as the weather. Silicone gripper elastic cuffs fit securely around the boot to seal out the wind and weather.

When not in use, the Barfly stuffs into an integrated drop pocket to easily stash away until you need it. Even fair-weather trips have their moments. Bring along some reassurance with the Barfly Microshell.

  • A combination of 30k/30K and 20K/20K waterproof breathability with a soft knit backer to wick moisture and eliminate clamminess
  • Breathable 2-way 20D and 4-way stretch 160D nylon fabric allow unrestricted movement
  • Combining full separating side and full-length non-separating side zips to simplify on/off with a step-through motion for quicker changeover
  • Hook and loop adjustable waistband allows you to adjust the fit to accommodate a variety of layers
  • Silicone gripper elastic cuffs help seal out wind and water for ultimate weather protection
  • Reinforced knees and lower legs with heavier materials and internal reinforcements add durability where it counts
  • Packs into an internal pocket for storage, so you can never lose the stuff sack
  • Designed to fit over knee braces, knee pads, or armored pants
  • 100% 20D Nylon 2-Way Stretch 100gsm
  • 30K/30K Hydrophilic PU Membrane with 10D jersey backer
  • 87% Nylon, 13% Spandex 4-way stretch 312gsm
  • 20K/20K Hydrophilic PU Membrane with 20D jersey backer 
  • C6 DWR (Durable Water Repellency)
  • YKK Aquaguard Vislon zippers

Our apparel is designed to fit true to size over body armor - no need to size up; we've done the math for you.


Product Care

Visit our Help Center for Product Care info.


We never cut corners during development or manufacturing, so we stand behind our products. If one fails due to a problem with materials or workmanship, we’ll make it right. All Mosko Moto products include:

Limited Lifetime Warranty

'Limited' means it does not cover:

  • wear & tear
  • neglect/misuse/abuse
  • aesthetics
  • sun degradation
  • modification and/or use for a purpose other than what the item was designed for

Crash Care Program


Pair With

The Barfly is the perfect way to add waterproof protection and extend the performance range of our WoodsmanSurveyor, or Kiger pants.

Customer Reviews

Based on 12 reviews
James C.
Barfly pants

Have yet to get out on a ride with the Barfly pants. However, impressed with how they fit when simply sitting on my bike in the garage. As a slight improvement could have them to be about 2 inches longer so the bottom of the pant is just above my ankle when I am sitting. However, I wear tall boots so it works. Great material selection!

Ryan Harder
Great Lightweight Option

I used to use my backpacking shells back in the day for emergency rain protection but destroyed enough rain pants and a couple jackets that I gave up on the ultralight options. These Barfly pants are everything that I wished I had years ago. They have extra protection in the lower legs where needed and they also have a stretch material that makes mounting and dismounting the bike much easier and protects the crotch from tearing open. I also dig how they fit over my Tech 7 boots with ease. I wore them over my Woodsman pants as a wind layer and they added the perfect amount of warmth. I haven't used them in a rain storm yet, but I live in Washington, so that day will come soon enough. I wouldn't use these as full-time pants or go crashing through sticker bushes with them, but they are perfect for stashing in your bag for the inevitable rain events.

Lightweight, compact and comfortable, but durable enough at the bottom

I needed some waterproof pants as light and compact as possible, but still durable enough, especially at the bottom of the legs where hiking ones usually fail. Those fits the bills perfectly, are very easy to put on and comfortable thanks to the stretch (and thanks to the stretch, they do not need to be overly baggy). Tested in rain and snow for hours. I will definitely buy the jacket once it is available in Europe.

Benjamin Tibbs

Love the pants and their packability. I will be taking them with me on our ride of Ireland, the Isle of Man and the 2024 Malle Rally in Scotland & England. Space and weight are a big deal and given the unpredictability of the weather in Great Britain and Ireland, I'm sure they will come in handy.


Its unreal how small I can pack these for how tough the lower, essential areas of durability are. They don't pack as small as my lightweight backpacking waterproof pants but I doubt they would fare well against highway speeds, much less a hot engine or a crash! Plus, they fit over the massive uppers of my Leatt enduro boots perfectly. 10/10