Naturally Sustainable
Machine Wash & Dry
Naturally Anti-Odor
Breathable & Wicking
At the peak of your workout, Mother Nature may try to stop you. Don't let her! When the heat sets in, stay cool with our Woolverino Micro Sleeveless. The range of movement you expect from a sleeveless combined with the extreme moisture-wicking power of Merino Wool will keep you going even when the elements try to stand in your way.
Fabric
- Fiber Content: 84% Merino Wool, 12% Nylon, 4% Spandex
- OEKO-TEX® STANDARD 100 Certified
- Woolmark® Certified
- Responsible Wool Standard® (RWS) Certified
- Knit: 145 g/m2 Micro Weight Jersey Knit
-
Microns: 17.5 Micron Fibers
- UPF Rating: 20
- Total Easy Care: Machine Wash and Dry
- Wool Source: Australia
- Imported.
Features
- Neckline: Crew Neck
- Yoked Shoulders: Seams are offset from your shoulder for a more comfortable backpack fit
- Tagless Construction: No itchy neck tags
- Flat Lock Seams: Prevents Chafing
- Layer Type: Base Layer
- Fit Type: Regular - Standard fit with a little bit of room to breathe, but not too baggy
- Model Features: The model in ash grey is 5'10 / 150 lbs wearing a medium
-
Runs True to Size - If you like a tighter, more athletic fit, try sizing down
- Weight: Size Large = 4.8 oz. (136 grams)
- Style #: 1003
Uses
- Ideal Seasons: Spring, Summer, Fall
- Activities: Everyday Wear, Hiking, Camping, Biking, Running, Fishing, Hunting, Snowsports
- Temperature Recommendations: 30°F and up while active, 60°F and up while inactive - Learn More
Care
Washing and Drying Instructions - Learn More
- Turn Inside Out
- Machine Wash Cold: Gentle cycle with like colors
- Detergent: Mild or wool-specific
- Tumble Dry: Low heat
- Storage: Place in an airtight container when not in use for long periods of time
- Do NOT Use: Fabric softener or bleach!
Product Story
Woolverino
Woolverino's Core Spun Technology brings you a merino garment that is durable, athletically fitted and high-performing. Warm when you need it. Cool when you don't. Nylon inner core offers strength, elasticity, resiliency, and durability. Merino Wool outer sheath provides insulation, moisture-wicking, and UV protection.
Our Guarantee
- 30 Day Satisfaction Guarantee - Return Policy
- 1 Year Warranty
- Extended 2 Year Warranty with Registration - Learn More
- New Hampshire, USA Customer Service
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MICROWEIGHT MERINO WOOL
- 145 g/m
- 84% Merino Wool, 13% Nylon, 4% Spandex
- Tested safe against over 1000 harmful chemicals including PFAS
- Machine Wash & Dry
- UPF 20
Our microweight Merino wool is our lightest and most breathable fabric. It’s designed for high-output activities in warm to hot conditions. Perfect for hiking, running, biking, and everyday wear when you need sun protection and moisture management without extra bulk. Our Microweight fabric also works great as a base layer in spring and fall. You can learn more about our different Merino fabric weights here.
Temperature (°F)
Activity Level
Benefits of Merino Wool
I've been wearing wool almost exclusively for years now. This is my first time trying out Minus 33 and I'm impressed. The feel and quality of the material, the design, the packaging were all top notch. Thanks!
Hi Don,
We're thrilled to hear you’re impressed with our wool tank top! Thank you for your kind words and for choosing Minus33. We appreciate your support and look forward to serving you again!
Have a great and safe 4th of July...
Linda
Minus33 Customer Service Team
My new favorite workout shirt. This shirt is super comfortable and cool. Looking to ditch my old polyester workout gear but was struggling to find sleeveless options until I stumbled onto this. Exactly what i was looking for.
Thank you for taking the time to leave a review for our Microweight Men's Wool Sleeveless Tank Top. We are thrilled to hear that it has become your new favorite workout shirt. Our team at Woolverino strives to provide comfortable and high-quality products for our customers, and we are glad that we were able to meet your expectations.
We understand the struggle of finding sleeveless options that are both comfortable and stylish. We are happy to hear that our product has filled that void for you. We hope to continue providing you with more options for your workout wardrobe in the future.
Thank you for choosing Minus33 and we look forward to serving you again.
Best,
The Minus33 Customer Service Team
Was looking to replace my polyester workout gear with wool and was struggling to find lightweight sleeveless t-shirts until I stumbled upon this one. Perfect sizing, super comfortable, and holding up well so far.
Hi there! We're so happy to hear that our Microweight Men's Wool Sleeveless Tank Top has met your needs for a perfect workout shirt. We take pride in providing comfortable and durable products, and we're glad to know that this one is holding up well for you. Thank you for choosing our Woolverino line!
- Quickly has become my absolute favorite running shirt.
- The feel and quality of the material, the design, the packaging were all top notch.
- This shirt is super comfortable and cool. Exactly what I was looking for.
- 5 stars: 13 (93%)
- 4 stars: 0 (0%)
- 3 stars: 1 (7%)
- 2 stars: 0 (0%)
- 1 star: 0 (0%)
I've been wearing wool almost exclusively for years now. This is my first time trying out Minus 33 and I'm impressed. The feel and quality of the material, the design, the packaging were all top notch. Thanks!
Hi Don,
We're thrilled to hear you’re impressed with our wool tank top! Thank you for your kind words and for choosing Minus33. We appreciate your support and look forward to serving you again!
Have a great and safe 4th of July...
Linda
Minus33 Customer Service Team
My new favorite workout shirt. This shirt is super comfortable and cool. Looking to ditch my old polyester workout gear but was struggling to find sleeveless options until I stumbled onto this. Exactly what i was looking for.
Thank you for taking the time to leave a review for our Microweight Men's Wool Sleeveless Tank Top. We are thrilled to hear that it has become your new favorite workout shirt. Our team at Woolverino strives to provide comfortable and high-quality products for our customers, and we are glad that we were able to meet your expectations.
We understand the struggle of finding sleeveless options that are both comfortable and stylish. We are happy to hear that our product has filled that void for you. We hope to continue providing you with more options for your workout wardrobe in the future.
Thank you for choosing Minus33 and we look forward to serving you again.
Best,
The Minus33 Customer Service Team
Was looking to replace my polyester workout gear with wool and was struggling to find lightweight sleeveless t-shirts until I stumbled upon this one. Perfect sizing, super comfortable, and holding up well so far.
Hi there! We're so happy to hear that our Microweight Men's Wool Sleeveless Tank Top has met your needs for a perfect workout shirt. We take pride in providing comfortable and durable products, and we're glad to know that this one is holding up well for you. Thank you for choosing our Woolverino line!
I wear this top everyday in the winter like long underwear. I like the long length that gives my whole torso a layer of warmth. It is super thin but warm. I would never wear it alone because it hugs my body so closely (and I have the largest size available). Nevertheless, I like that it is smooth which makes it easier to add a shirt or sweater on top. It is also great to sleep in because it is so long and stretchy.
Ruth,
Thank you for taking the time to leave such a positive review for our Micro Weight - Men's Wool Sleeveless Tank Top Woolverino. We are thrilled to hear that you find it fantastic for everyday use and that it provides your whole torso with a layer of warmth during the winter. We understand your concern about the snug fit, but we are glad that you appreciate the smoothness of the material for layering purposes. We hope you continue to enjoy wearing it, even as sleepwear. Thank you for choosing our product and for your support.
Kindly,
Sue
Customer Service
Perfect fit
Quickly has become my absolute favorite running shirt. Wore the black one for a 1/2 Marathon in 66 degree 97% humidity weather and it performed perfectly. Wicked sweat, didn't get weighed down and stayed cool. Just bought the gray one and will definitely buy additional colors once made available.
Product was as advertised. Fit was perfect. Will be ordering a second one.
Hi,
Thank you for taking the time to leave a review. We are thrilled to hear that you are happy with the fit of our Micro Weight Sleeveless Tank Top. We hope you enjoy wearing it and we look forward to serving you again in the future. Thank you for choosing our product!
-Jeannie
The cut is good but much too large. I would have preferred an XS to be more form fitting to use as an underlayer. M 150LB 5'10" slim
Hi,
Thank you for leaving a review and sharing your feedback with us. We're glad to hear that you like the material of our Micro Weight Men's Wool Sleeveless Tank Top Woolverino. We apologize that the size did not meet your expectations. We will take note of your preference for a more form-fitting XS size and pass it on to our product development team for future consideration. We appreciate your support and hope to have the opportunity to serve you better in the future.
Jeannie T.
This top is comfortable and fits great. Great for work outs as it wicks moisture from your skin. Would like to see more colors like the green on your label or maybe red and blue.
Dale,
Thank you so much for leaving us a review! The Woolverino Men's Wool Sleeveless Tank Top is a great top. We are still a small company so we love getting feedback and suggestions from our customers. Enjoy your workouts!
-Minus33
Meets or exceeds expectations in every way😁
Bruce,
Thank you for the great review! We greatly appreciate your feedback and for giving the Minus33 Woolverino Sleeveless Tank Top your highest recommendation!
Best,
-Steven D
Lightweight, comfortable, mostly wool!
I like the fact that they are light weight, cool for working in the garden or handling livestock. When working in the heat it doesn’t weigh you down like cotton, but breathes, unlike plastic fibers.
This are a snug fit, not loose, so i go one size up on these. Loose is my preference, on all other shirts through here i go my size, it’s just micros that i up
Mark,
We are glad to hear that you are staying cool during the summer while working in your garden or with the livestock. Owning a homestead of my own, I know how important being comfortable can be. Thank you for the great review!
-Melinda W.
I bough both colors and they are extremely breathable and ideal for hot weather areas like the Caribbean. I will definitely buy more in the future. It would be awesome if they would come in other colors other than black and silver.
Hi Jose A.
Thank you for the great review! Glad to hear you like your purchase. The Woolverino is great for keeping you cool, while giving you good range of movement.
Jeannie T.
Very comfortable , soft merino top that is very versatile. I am happy with this purchase.
Mike, we're so happy to hear that you're satisfied with your spending, thanks for letting us know! -Felicia W.


