Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie

Review by Erin Trail

The Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie is a lightweight option that’s good for both summer and winter months.

Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie
Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie

Details

  • One Chest Pocket
  • YKK Semi-Auto Locking Zipper Pull
  • Zipper garage at neckline
  • Flatlock seams
  • Fit: Regular
  • 84% Merino Wool, 12% PFAS-Free Nylon, 4% Spandex
  • OEKO-TEX® STANDARD 100 Certified
  • Woolmark® Certified
  • Responsible Wool Standard® (RWS) Certified
  • 145 g/m2 Micro Weight Jersey Knit
  • 17.5 Micron Fibers
  • UPF Rating: 20
  • Total Easy Care: Machine Wash & Dry
  • Wool Source: Australia

Fit and Function

I am a women’s medium on the Minus 33 size guide and found that the Woolverino Micro 1/4 Zip Merino Sun Hoodie fits true to size.  There is a slight amount of room beneath the hoodie for layering, but it’s not loose or baggy.

Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie
Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie

The Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie’s features are fairly standard for a hoodie.  Of note, there’s a small zipper chest pocket.  The pocket isn’t big enough for a phone, but it made a nice and secure spot to place my sunglasses to prevent me from losing them of stepping on them.’

Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie
Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie

I have been wearing the Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie during camping weekends in Colorado’s Rocky Mountains. My main test of the hoodie was on a solo overnight bikepacking trip.  I was looking for a layer that would serve as both my main shirt for the ride to my campsite as well as double as a shirt for wearing around camp and for sleeping.

The Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie performed very well during my camping trips.

The seams on the Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie are well done.  They’re flatlock seams and are placed well, so they don’t rub or chafe or interfere with packs.

The knit fabric of the Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie is on the light side.  My hoodie is the Mint colorway and is definitely a bit see-through.  The UPF 20 rating did provide enough sun protection where I didn’t get sunburned, even with 2 hours on my bike in direct sun.

Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie
Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie

I was pleased with how breathable and how quickly the Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie dried.  I wear a hydration pack when I ride, so my backside gets pretty sweaty.  Once at camp, by the time I had my bike unpacked and my tent set up, the hoodie was completely dry.

Thanks to the Merino wool, the hoodie remained odor free, even after 2 hours of pedaling.  I felt fine wearing the hoodie around camp and to sleep in, never once feeling grungy.

The Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie fabric does seem to be pretty durable, despite it’s light weight.  Some shirts don’t hold up well against hydration packs.  This hoodie didn’t show any signs or wear (pilling or rubbing).  The only sign of use after my 2 days of wearing it was a sweat stain that easily came out in the wash.

Happily, the Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie is machine washable, making it easy to care for.

I also used the Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie as a baselayer overnight as temperatures dropped.  The fitted hood stayed in place and I appreciated the zipper garage, which allowed me to fully zip up the hood and not have a zipper irritating my neck or chin. The thumbholes are well placed and the shirt layered well under my zip-up fleece hoodie.

Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie
Minus 33 Woolverino Micro 1/4 Zip Merino Sun Hoodie

Erin Trail

Trail Boss of Stoke

Erin Trail’s hobby is collecting hobbies. She’s a 5th Generation Coloradan and grew up exploring the outdoors on family camping trips and hikes.  Her first backpacking trip was at eight years old to Grizzly Reservoir – she proudly carried all of her own gear those 3 miles from the main parking lot to the Reservoir.
Erin Trail of Engearment.com
Erin Trail of Engearment.com
Erin is an adult-onset athlete who started as a Masters Swimmer and then developed into a triathlete.  She has completed 5 Ironman races and nearly 20 x 70.3 distance Ironman races, including the World Championship in Lahti, Finland, in 2023.  In 2025, she raced for Team USA in Pontevedra, Spain for the World Triathlon Cross Tri World Championship. She placed 9th in her age group and was the 1st American woman in her age group.
Somewhere along her triathlon journey, she picked up deep love of cycling. Cycling encouraged her to see landscapes in a new way, learn new skills and to develop self reliance; now she often goes and does Type 2 rides just to see if she can do it.  She’s got all the bikes: gravel, mountain, fat bike, time trial and road.
She is even known to combine her love of camping and cycling and go off on solo 24 hour overnight bikepacking trips in the mountains of Colorado. In addition to bikes, she teaches yoga, lifts weights, skis, SUPs and has recently purchased a campervan.

Erin is a former Montana park ranger with a degree in environmental engineering.  She loves getting into technical details while putting her gear (and herself) through the paces. She shares her home in Colorado with her husband, Will, and her 3 cats (Zipper, Brewtus, and Simcoe).
Fall and winter 2025 will bring Erin to the “Adventure Side”, with many camping, vanlife, bikepacking, and mountain bike rides. Once the snow flies, she can be find resort skiing, fat biking, and triathlon training (inside and outside).
In 2026 Erin took the National Championship in her Age Group for the USA Triathlon Cross Tri. She’s also racing the a National Championship Road Sprint and Olympic Distance race in Milwaukee and a few other off road triathlons and bike races.  In 2027, she will represent Team USA at the World Championship Cross Triathlon in Edmonton, Canada. She’ll also save lots of room for adventure time with her friends and husband.
When not adventuring, she can be found on a sunny patio somewhere, drinking beers with her husband.

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