Tern Ultralight Merino Wool Hoodie

New Poly Blend fabric will dry faster & retain shape even better than original nylon fabric blend

The Tern Ultralight Merino Wool Hoodie is engineered for optimal moisture-wicking, comfort, sun protection, and quick-drying performance while managing odor & bacteria buildup. 

  • Moisture Management: Experience excellent moisture-wicking capabilities, allowing the merino wool blend to effectively draw moisture away from your body while retaining its shape exceptionally well. Ideal for both hot weather and as a base layer in cold temperatures. 
  • Comfortable Fit: The athletic fit of the Tern ensures comfort without being tight or restrictive. This design enhances the merino wool's moisture-wicking properties. With no hardware, simplicity reigns, contributing to decreased weight for high activity.
  • Odor and Bacteria Resistance: Benefit from the natural odor-resistant properties of merino wool, making the Tern perfect for travel, running, hiking, and everyday use. The ultralight weight adds to its versatility.
  • Better Shape Retention: the new Poly blend Tern fabric holds its shape exceptionally well for merino wool, even when wet.  It will stretch sufficiently without “bagging out” & becoming shapeless. 
  • Faster Dry Times: the Tern dries faster than typical merino wool blends.  This gives you better performance in high-output activities & will help you regulate your temperature better.

The natural odor resistant & ultralight properties of merino wool make the shirt perfect for travel, running, hiking, and everyday use.

The fit should be athletic, but not tight or restrictive- this allows the merino wool blend to more effectively wick moisture from your body.  There is no hardware, adding to the simplicity and decreasing weight.  The Tern is a high performance piece for high activity.

Whether shielding yourself from the sun on warm days or using it as a base layer for colder temperatures, the Tern Ultralight Merino Wool Hoodie offers unmatched performance. Elevate your outdoor experiences with a shirt that adapts to your lifestyle.


Hoodie (Men's L): 5.4 oz


True Flat-Lock Seams

Raglan Sleeves

Minimal Clean Collar Hood

Excellent Stretch

Moisture Wicking

Bacteria/Odor Resistant

Quick Drying

Athletic Fit for Baselayer or Stand-Alone Layer

Holds Shape (even when wet)

UPF Rating 36+

Farm to fabric RWS (Responsible Wool Standard) certified wool by NuYarn™


  • Fabric Poly Blend: 115 GSM Merino Wool blend - 63% merino (18 micron), 29% polyester, 8% nylon, knit
  • Fabric Original Nylon Blend: 115 GSM Merino Wool blend - 58% merino (18 micron), 42% nylon, knit
  • Fit: Close
  • The Tern hoodie should fit close to skin and fit easily beneath other layers.
  • Gender: Men's sizing
  • PFAS free

Care: This product is built for ultralight performance, & was not built to withstand abrasion.

Do not wash in a machine that has an agitator. Use mild detergent on a delicate cycle with cold water. Hang dry.

Note: If used with a backpack, some pilling may occur. Pilling will not affect performance, & is not covered under warranty.

Warranty: Outdoor Vitals Performance Promise


Layering Collection: Kinetic

Layering Category: Moving Set or Baselayers

Product Care

Your Tern Ultralight Merino Wool apparel is a high performance piece of gear. It needs some extra attention to keep it performing at the highest level.

Please read through the care instructions below to ensure that you care for it properly:

Before Washing

  • Never wash your merino wool with anything with velcro or similar hook & loop characteristics.
  • Never wash your merino wool in a washing machine that has an agitator.
  • If you cannot follow any of these prior instructions you should hand wash your product using the detergent and drying process described below.

The Wash & Dry Process

  1. Use a mild detergent like Dreft (for babies) or Nikwax (for technical gear).
  2. Choose Low Spin or Delicate wash.
  3. Choose Cold Wash & Cold Rinse (add extra rinse if possible).
  4. Hang dry until the product is completely dry.

For more information on caring for your gear please visit https://outdoorvitals.com/pages/care-guide-faq


Nuyarn® Technology

Outdoor vitals uses Nuyarn­­® Technology in all of our merino wool fabrics & apparel. Nuyarn is a spinning technology that releases the natural performance characteristics of wool fiber that are otherwise twisted out by traditional wool spinning methods. 

Essentially the result is performance products made from natural fibers that can outperform synthetics. 

Nuyarn® can make wook that performs as closely as possible to the way it does in nature, to rival or exceed the performance of synthetic alternatives. 

Types of Spinning

 Ring Spun & Traditional Core Spun techniques compress the natural air pockets in the fiber, create loops, & restrict the natural movement of the fibers -essentially creating a rope-like structure that can be itchy next to skin. 

Nuyarn® does not twist the fibers. Instead it drafts merino fibers along a high performance filament, resulting in 2 ply yarns with much more volume & aeration.  (This 2 ply yarn structure is 35% finer than yarns spun on a conventional ring frame. Combined with the Nuyarn® thermal advantage, this offers the capacity to engineer much lighter, high performance fabrics as a result.)

Benefit Summary

The Nuyarn® method of twist-free spinning allows us to create products that outperform traditional merino wool & synthetics, and offer a natural enhancer to athletic performance. 

  • 5x Faster Drying
  • 85% More Elasticity
  • 120% More Seam Strength
  • 53% More Air Resistant
  • 30% Less Resources Used
  • 8.8x More Durable
  • 35% More Thermal Retention
  • 50% More Burst Strength
  • 25% Less Energy Used


Lighter Weight, Higher Performance

Compared to traditional merino wool, Nuyarn® wool is:

  • 5x Faster Drying
  • 85% More Elastic
  • 8x More Durable
  • Uses 30% Less Resources

"Twist-Free" Spinning

Made with Nuyarn® Spinning Tehcnology

Nuyarn's proprietary spinning technology produces a much lighter & higher performance wool fabric

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Customer Reviews

Based on 92 reviews
Mike Ton
Best lightweight and breathable hoodie

I basically tried all the sunhoodies from Amazon to premium brands, and this one plue the Wool and Prince Tencel Merino are the only two I ended up really using

Outdoor Vitals Nuyarn hoodie is exceptionally good for 90+ degree 5 mile + walks

The breathability is unmatched and doesn’t feel plasticky on your skin like polyester of most other hoodie brands

It does pill up over time and is somewhat less durable because of how thin it is but the heat wicking is worth it

Holds well in the smell department too, I didn’t notice any scent until day 5 of consecutive 100 degree 5 mile walks

The Wool and Prince tencel hoodie is more suitable for more formal social events, so between the 2 I am all set

Highly recommend this outdoor vitals sun hoodie ⭐️⭐️⭐️⭐️⭐️

Susan king
Tern ultralight hoodie

Love hiking in this hoodie no matter the weather. I have worn this in warmer an cooler weather. It's breathable, lightweight , so comfortable!! No sticky sweat to the body. The hood is great for hot sun, or keeping the wind at bay. I have two of these so when one is in the wash, i have a back-up. Highly recommend !!

dean copley

I ordered the Outdoor Vitals Tern Ultralight Merino Wool Hoodie for my Colorado Trail trip this month. After I pulled it out of the box, I removed the neck tag and tried it on. I immediately noticed a thumb size hole in the center of the chest, so I contacted Guidefitter about a replacement. Guidefitter staff were very helpful but Outdoor Vitals informed them not to replace or refund the poor quality product because the neck tag was removed. I contacted Outdoor Vitals about them sending me a shirt with a hole in it. They replyed stating since I removed the tag they wouldn't warranty the product. If I wanted to pay and mail it to them I can have it repaired for a possible $20 charge. I paid full price, I should receive the entire shirt. Tayson Whittaker and Outdoor Vitals only want your money!

Hello, thank you for taking the time to share your thoughts and frustrations. Your concerns are completely valid. Unfortunately, in the past we have had issues of products use and abuse of our returns policy due to the leniency of corporations like Amazon. We cannot determine if the product was an out of box issue without tags and packaging attached, so it likely would not qualify for replacement. It is always recommended to try on for fit and to do a basic visual inspection of the item received before removing and disposing of tags and packaging.

While under the circumstances it may not qualify for replacement, we are always determined to make sure your gear can perform well for you on trail. If you would still like to have your Tern inspected for possible solutions, I have emailed you return instructions.

Derek Stewart
The perfect multi-weather hoodie

I have about 10 trail days using this hoodie at the time of writing this review. Conditions I used the hoodie in include warm sunny days (low 70's), cool rainy days, right through to a venture into the alpine where I got snowed on. In direct sun, the hoodie does a great job of shield from sun while breathing enough to prevent overheating. In drizzle or light rain, I skipped a jacket and my body heat was continuously drying the hoodie. It also does well under a rain shell, keeping you warm even when wet. I liked it so much, I bought a second one!

Best Hoodie for Cool Weather

I am a big OV fanboy with a signifigant amount of my gear coming from OV. When they launced this version of the Tern I had plenty of store credit in my account so I figured I'd see how it fit into my system. WOW!!!! I am so impressed at how light and comfortable the hoodie is while still providing the perfect amount of warmth to hold off the chill from cool early mornings or cool late evenings. I do not use it as a base layer because I am not a fan of merino wool against my torso but, as a mid layer for hiking or to stave off the lower tempatures in camp this piece rocks.

My only complaint, AS I HAVE WITH ALL LONG-SLEEVED NON-SHELL LAYERS, is that it does not come with thumb loops or a dropped back. What is up with that? Seriously OV, put thumb loops and a dropped back on all of your long-sleeved non-shell layers...it makes a massive amount of difference in performance.