Lightweight windbreakers are worth their weight in gold. Maybe that’s not the right analogy because the PEARL iZUMi Summit Wind Jacket doesn’t weigh much (but you get the idea). This lightweight gem has delivered as promised on morning trail runs this year.
PEARL iZUMi Summit Wind Jacket Features:
- Lightweight ripstop fabric blocks wind and light rain
- Streamlined hood for off-bike or cool weather
- PI Dry® C0 technology for PFAS-free durable water repellent
- YKK two-way front zipper for access and ventilation
- Two zippered hand pockets
- Interior stow pocket with bungy clip for storage
- 100% recycled polyester
- BioViz® reflective elements can be seen from 100 meters away
- MSRP: $120

Ultralight wind blocker
As morning temperatures have started rising over the past few months, I’ve been able to give the new PEARL iZUMi Summit Wind Jacket a thorough bit of trail testing. Layered with warm base layers, thin ones and short-sleeves, this windbreaker has come in clutch just when needed. Yes, it is built for mountain biking, but I’ve been testing it out trail running to show its versatility.
It’s a windbreaker, right? Well, of course it is. That’s part of what makes it great. Windbreakers are essential to have around to block a cold breeze, stave off winter’s chill and protect from light rain. If you have a good one, it will be around for a long time — stuffed into a bike jersey, in a hydration pack or in back of the Subaru. When it’s time to pull it out, you’re always grateful that it provides immediate warmth and protection.

Slipping on the Summit Wind Jacket, it features an efficient fit. I’m actually surprised that PEARL iZUMi calls it “relaxed” because I would definitely call it more streamlined. I’m wearing my typical size for PEARL iZUMi, but just keep that in mind. As you’ll see in all my photos, I would definitely not call it baggy and it never gets frumpy on even the longest trail runs.
PEARL iZUMi always chooses top-notch components and this one features YKK zippers throughout with a two-way front zipper. The simple pulls are easy to move up/down and the 2-way front allows easy access to jersey pockets if worn cycling.

When I’m looking for a good windbreaker, I want simplicity. The Summit Wind Jacket offers simple elastic cuffs, hem and hood that offer comfort and reduce weight and bulk. The cuffs feel great at the wrist and keep the wind from penetrating under the hem. Elastic toggles are largely unnecessary and wouldn’t allow you to pack it down as small as it gets. The built-in stuff sack and elastic clip here make it easy to stash it on your frame or elsewhere.

I have 100% loved pulling this windbreaker on for morning trail runs in the 30’s and 40’s. I wore it on a colder morning and it’s better than nothing, but it required constant motion to stave off winter’s chill. Lately, I’ve been wearing it under the Mammut Tree Wool FL Long Sleeve Shirt and it’s just the right combination of breathability and warmth. Deeper into the run, I do notice the elbows and front panels will get saturated. The good thing is the fabric dries out wicked-fast. If I stop and pull it off to hang dry, it’s merely a matter of minutes before that moisture dissipates.

While running, the collar sits below the chin and never gets in the way. Even when the hood is deployed, it stays under the chin for clear breathing. And, the hood can comfortably be worn alone or atop a running hat. When ventilation is needed, it’s easy to unzip and the collar stays wide open for the utmost airflow. It has held up to light abrasions and branches here-and-there, but don’t expect it to be indestructible.
Fit: I’m 5’11” and 175 lbs, wearing the size medium (my usual size for PEARL iZUMi)
Buy Now: Visit PEARLiZUMi.com
The Bottom Line
Windbreakers remain one of the unsung heroes of the outdoors. PEARL iZUMi has a good one with the Summit Wind Jacket -- whether you use it cycling or running. It does breathe well, but gets saturated at the elbows and front after a long trail run. It feels light and disappears as it blocks the wind and allows me to run at the highest level. Don't expect waterproof performance, but let it fly on those cold, dry mornings.
The Good:
- Lightweight and packable
- Moves well with you on the trail
- Efficient fit and cut
- Collar sits under the chin for uninhibited breathing
- Simple cuffs and hems
- Stays stink-free for many uses
- Great wind blocking
- Hood comes in clutch
The Bad:
- Don't expect much rain protection beyond a light sprinkle
- Wind Protection
- Water Resistance
- Breathability
- Packability
- Fit and Mobility
