Minus33 Merino Wool Clothing Woolverino Women's Micro Racerback Tank Top
Minus33 Merino Wool Clothing Woolverino Women's Micro Racerback Tank Top
Minus33 Merino Wool Clothing Woolverino Women's Micro Racerback Tank Top
Minus33 Merino Wool Clothing Woolverino Women's Micro Racerback Tank Top
Minus33 Merino Wool Clothing Woolverino Women's Micro Racerback Tank Top
Minus33 Merino Wool Clothing Woolverino Women's Micro Racerback Tank Top
Minus33 Merino Wool Clothing Woolverino Women's Micro Racerback Tank Top
Minus33 Merino Wool Clothing Woolverino Women's Micro Racerback Tank Top
Micro Weight - Women's Wool Racerback Tank Top Woolverino - Minus33 Merino Wool Clothing
Minus33 Merino Wool Clothing Woolverino Women's Micro Racerback Tank Top

Micro Weight Women's Racerback Tank Top Woolverino

Regular price$59.99
Shipping calculated at checkout.
Size chart


Please note, measurements refer to body size, not garment dimensions, unless otherwise noted. Measurements are in inches.

Women's Clothing Size Chart

Size USA Size Chest (in) Waist (in) Hip (in) Shirt Length (in) Inseam (in)
XS 2 32-33 24-25 34-35 23.5-24.5 26-29
S 4 to 6 34-35 26-27 36-37 24.5-25.5 28-30
M 8 to 10 36-38 28-30 38-40 25.5-26.5 29-31
L 12 to 14 39-41 31-33 40-42 26.5-27.5 30-32
XL 16 to 18 42-43 33-35 43-44 27.5-28.5 30-32
2X 20 to 22 44-45 35-37 44-45 28.5-29.5 30-32
3X 24 to 26 46-47 37-39 46-47 29.5-30.5 30-32

How to Measure

Chest: Measure the circumference around the fullest part of your chest, underneath the arms.

Waist: Measure the circumference around the natural waist, near the belly button.

Hip: Measure the circumference around the fullest part of your hips.

Shirt Length: This measurement refers to the approximate size of the shirt back length, from the neck to the bottom hem.

Inseam: Measure from the center of the crotch to the end of the ankle.

Fit Types

Athletic Fit

Regular Fit

Relaxed Fit

Athletic Fit Regular Fit Relaxed Fit

Fits best as: Base Layer

Skin tight, slim, compression style fit. Wear this layer first and add on top of it if needed.

Fits best as: Base Layer, Mid Layer

True to size, standard fit with a little bit of room to breathe, but not too baggy. Perfect on its own or with a t-shirt or thin shirt underneath.

Fits best as: Mid Layer, Insulating Layer, Outer Layer

A little more room than you would find in a Regular fit. Enough space to fit 1-2 layers underneath.

Fit FAQs

What if I am between sizes?

If you are between sizes, we recommend sizing up or down based on what fit type you would prefer, and based on how you plan to wear the piece. Our knitted merino is stretchy and you could realistically go with either size. If you would prefer an Athletic fit, size down. If you prefer a Regular or Relaxed fit, size up.

Do I need to size up/down to layer?

Generally, no, you do not need to purchase a different size than normal. Our base layers are designed to fit right into your current layering system. They are also designed to work with other products in our line, too. You may wish to adjust your sizing if you plan to wear one of our garments in a way that it is not intended, if that's the case please feel free to contact our customer service team for help.

Does your clothing run true to size?

Yes, our clothing runs true to size and is sized similar to most other American brands. If a sizing discrepancy is discovered, you will see fit advice in that product's specific listing.

Not sure what size or fit type you need?

Learn more about layering systems and how they can help you choose. Still need help? Contact our customer service team for personalized advice.

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Our Guarantee
woman walking to the lake with paddle board wearing woolverino micro weight ash gray v-neck woman paddle boarding wearing ash gray woolverino micro weight v-neck


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.

Micro Details

Micro weight gives you a feather-light option. Micro is ideal as your base layer, underwear, or on its own when the temps heat up. Merino’s moisture-wicking properties keep you cool when you’re on the move. Core Spun yarn provides extra durability while still offering merino's super soft, insulative, and moisture wicking properties next to the skin. Nylon inner core offers strength, elasticity, resiliency, and durability. Merino Wool outer sheath provides insulation, moisture wicking, and UV protection.

145 g/m2

Jersey Knit

17.5 Micron

84% Merino Wool
UPF Rating 20

Compare Weights


Activities: Hiking, Camping, Lifestyle, Snowsports, Running, Biking.

Seasons: Spring, Summer, Fall, Winter.

High Activity Temperatures: 45°F to 75°F

Low Activity Temperatures: 60°F and up

Learn About Layering

Why Merino Wool?

infographic of woolverino corespun yarn

Core Spun Technology

Core Spun yarn provides extra durability while still offering merino's properties next to the skin. The nylon inner core is wrapped with Merino Wool and a touch of spandex for stretch.

two people sitting next to a river wearing merino wool

Moisture Wicking

Minus33 Merino Wool regulates the amount of moisture on your skin by absorbing any moisture or sweat on your body. Then, the absorbed moisture evaporates out of the fabric into the atmosphere.

merino wool tshirt drying in the sun


Merino Wool fibers naturally reject any bacteria in moisture or sweat as it is wicked away, so foot fungus and smelly odor will not be a problem while wearing our products.

woman hiking with her dog crossing a river

Insulates When Wet

Wool will absorb up to 30% of its weight in moisture without feeling wet or clammy. If you do get wet, wool will insulate you better than cotton or polyester materials.

woman doing yoga on top of a mountain in merino wool base layers

UV Protection

Don’t worry about sunburn on a sunny day summiting a peak. Lightweight layers have a UPF rating of 25. Midweight and Expedition have a UPF rating of 50+.

Australian merino wool sheep


Merino Wool has a low environmental footprint and naturally returns to the elements. Shear a merino sheep in the morning, and in the afternoon they’re happily nibbling their way towards renewing next season’s clip. 



Total Easy Care (TEC) Merino apparel is designed for today's busy lifestyle. Total Easy Care Merino garments are all machine-washable, and are suitable for tumble drying.

Even after frequent laundering they retain an 'as new' appearance. They won't shrink, lose their shape, fade or color-bleed. They remain soft and comfortable for the life of the garment.

Customer Reviews

Based on 9 reviews
the best!

the cut and style of this tank is perfect. love the way it fits and runs true to size. just as great for daily wear as well as it is for playing. highly recommend!

So light & breathable too! Thank you for your review!

my new favorite hiking tank!

soft and dries quick!


Thanks for taking the time to leave a review for our Micro Weight Women's Wool Racerback Tank Top. We're so happy to hear that it's become your new favorite hiking tank! Our Woolverino fabric is designed to be soft and quick-drying, making it perfect for all your outdoor adventures. Thanks again for choosing our product and happy hiking!

-Steven D

perfect merino tank

Minus33 are the best base layers, and worth the price. Don’t bother with cheaper alternatives. This tank is cut well, neckline is low enough to wear the tank under other shirts without it showing, the cut at shoulder and armpit is comfortable without showing bra. Looks nice enough to wear alone. Lies well as a base layer. Just what I was looking for. Medium fits me perfectly. Would likely be fine for someone bustier too.

AZ biZ
Love this tank top.

I have had my wool tank top for about nine months and I still love it. It’s been washed and dried many times, but still looks good. I love the fact that wool does not hold smells. I have the tank top and I have longsleeve wool tops and love them all. They are so warm and soft.

Snow country family
It's the perfect layer !

I ordered my first Minus33 Merino Wool shirt when I was going to Canada last year in the middle of February. It was amazing, and kept this born and bred southerner toasty warm. But when I came home, I realized I wouldn’t need to wear it more than once or twice a season in NC. And even if I got a more lightweight version, I would still have 2 key problems: 1. The neckline on traditional thermal shirts is very high, making layering under normal shirts difficult, and 2. The arms often aren’t tight enough to comfortably layer under a normal shirt. This means I would have trouble wearing it with work clothes, and since I travel for my job, I don’t want to take up a lot of space in my suitcase with layers and sweaters.

Then I found this tank top. It’s amazing. It’s super soft (not itchy at all), keeps my core warm, has a scoop neckline that works even with my v-neck shirts, and without sleeves, solves the problem of bunched up arm layers. It’s perfect. I now have 3 of them. I’ve worn them all winter, and found that I actually wear fewer, thinner, layers to stay warm. They also take up almost zero space in my suitcase! And since merino wool is odor resistant, you can go several wearings without having to wash, which again makes it perfect to travel with. It may seem pricey at first, but try one. You won’t be disappointed.