Women's Alpaca Wool Sports Bra

160 Ultralight

$70.00
4.1Rated 4.1 out of 5 16 reviews

Match your first layer to a steadier pace. This women's Alpaca sports bra pairs a racerback cut with low to medium support for walking, yoga, and lower-impact movement.

This size is currently out of stock. Get notified when it's back.

Low Impact Dyes

Red

Natural Dyes

Why natural?
Size: XSSize guide

This size is currently out of stock. Get notified when it's back.

Free US shipping on orders over $200.

Final sale for hygiene reasons. This intimate apparel can't be returned or refunded. Defective-item claims are handled separately under our warranty.

Support for a steadier pace.

Your layer starts with Alpaca wool from Peru. Its smooth fiber surface gives the knit a soft feel, while the knit structure allows air to move through as you do.

Product info

  • Match your support to your movement

    The racerback design offers low to medium support for walking, yoga, and other lower-impact activity.

  • An ultralight first layer

    The 160 g/m² fabric keeps the knit light beneath your top.

Perfect for

  • Walking
  • Yoga
  • Low-impact activity

Product details

What goes into your layer
  • Fabric100% Alpaca wool
  • Thread100% cotton
  • Labels100% organic cotton
  • DyesNatural or OEKO-TEX certified, depending on the color. Undyed colors have no added dye.
  • Label inkGOTS certified

Specifications

  • Fabric weight160 g/m²
  • Weight67 g / 2.4 oz in size S
  • ConstructionRacerback sports bra with low to medium support
  • FitFitted cut with natural stretch
  • Made inPeru
Size & fit

Use your body measurements to choose your size. These are body ranges, not flat garment measurements.

SizeChestWaist
XS31 - 33.5 in23 - 26 in
S33.5 - 36 in26 - 29 in
M36 - 39 in29 - 31.5 in
L39 - 42 in31.5 - 34 in
XL42 - 44.5 in34 - 37 in
XXL44.5 - 47 in37 - 40 in
SizeChestWaist
XS79 - 85 cm59 - 66 cm
S85 - 92 cm66 - 73 cm
M92 - 99 cm73 - 80 cm
L99 - 106 cm80 - 87 cm
XL106 - 113 cm87 - 94 cm
XXL113 - 120 cm94 - 101 cm
Care for your layer

Hand wash or machine wash on a gentle/wool cycle in cold water (50-68°F). Use a mild wool-safe or pH-neutral detergent. Wash with similar colors. Don't bleach or use fabric softener.

Reshape while damp and lay flat to dry. Don't tumble dry, twist, or wring. Cool iron if needed. Store folded in a cool, dry space with airflow; avoid hanging.

Naturally dyed colors can transfer with sweat or friction. Wear them with dark clothing or equipment, wash sparingly, and avoid citric acid, which can lighten the color.

Shipping & Returns

US orders over $200 ship free. Estimated US delivery is 7 to 10 business days, including preparation and transit. You'll receive a tracking number by email once your order ships. International rates are calculated at checkout; estimated delivery is 10 to 20 business days. Customs duties and import taxes are your responsibility.

For hygienic reasons, all underwear and intimate apparel (including boxers, panties, thongs, and bras) is final sale and cannot be returned or refunded.

Women's Alpaca Wool Sports Bra: 160 Ultralight

The benefits

Why Alpaca wins

Alpacas en los Andes peruanos

Andes-adapted for changing temperatures

Alpacas evolved where days run warm and nights turn cold. Their semi-hollow fibers trap insulating air, helping you stay comfortable as the temperature changes.

Softness starts in the fiber

Alpaca’s smoother scales give the fabric a soft feel against your skin. Comfort comes from the fiber’s structure.

Comfort starts next to your skin

Alpaca wool brings breathable comfort to your first layer. Wash intimate apparel after wear to keep it clean; natural odor resistance doesn't replace regular care.

Single origin

Peru, start to finish.

Arms of Andes is a family company with roots in the Peruvian Andes. “Arms” brings together the initials of four siblings. That connection to Peru shapes what we make and where we make it.

From fiber sourcing and yarn spinning to knitting and sewing, production stays in Peru. One country, with the people and knowledge behind your gear close together.

Learn our story

Customer reviews

  • 5 stars: 10 (63%)
  • 4 stars: 2 (13%)
  • 3 stars: 1 (6%)
  • 2 stars: 2 (13%)
  • 1 star: 1 (6%)
F
Frances
I'd been hunting for a bra like this (100%...

I'd been hunting for a bra like this (100% natural) for a while but it was hard to find something that didn't contain some synthetic material - often companies will advertise 100% alpaca or merino but if you look at the tags it'll still contain a percentage of nylon, polyester, elastane or all of the above. I like the fit and have worn it working out - boxing/playing volleyball and am happy with the support. After multiple workouts it still doesn't smell - it'd be great for backpacking. My only nitpick is that the armholes seem to have stretched out a bit, doesn't make a difference in fit and hoping they'll shrink a bit when washed. Overall super happy with the bra - and other items I've ordered so far.

L
Lynda Wacht
Good product

I was hoping to be able to use this for a fast pack but the support is just not there for running. It is a nice hiking bra. I had to wash it before I wore it because it was a quite a bit itchy. But it fits well and looks like it's going to last.

L
Lisa F
Very happy with this bra

It’s really comfortable! I needed something that would hold my insulin pump when I wear a dress and don’t have a waistband to clip the pump on. This works very well!

Hi Lisa, thank you so much for sharing your experience! We’re really happy to hear it’s working well for you and helping make things easier. We truly appreciate you taking the time to leave your feedback

T
TJ
Sport bra

I really wanted to like my new bra as I am trying to transition to natural clothing. But unfortunately my experience is the same as some other reviewers. I wouldn't call it a sport bra as it doesn't offer much support. It fit me well just trying it on but just wearing it for first time on my 30 minute run it stretched considerably. It retained its shape and size after washing it but after wearing it again the bra ended up being oversized again.

R
Repeat Customer P
Amazing Feel!

Fabulous sports bra. Fits great, comfortable and feels amazing. Wonderful wool.

L
L.P.
I want to love it ..

but it's now quite what I was hoping for. The material is excellent and soft and moisture wicking. The fit, however, is less desirable. I got an extra large and there is no room for extra large breasts. The racerback is too long making the bra somewhat ill-fitting. The biggest problem though is that anyone with anything over a b cup will be popping out the sides. Also, it couldn't be called a sport bra because there's really no support. Basically it just keeps you from swinging around too much.

Hi there, thank you for sharing your honest feedback. We're glad the material worked well for you, and we appreciate your notes on the fit and support. This helps us as we continue improving our designs!

N
Nancy
Performance lacking

The bra is very comfortable to wear, I’ve trekked over 30 miles with it and washed it just once. While initially there was some tensile strength, as it is worn, the weave loosens/softens and ultimately It offers very little support for my C cup, and it seems that the weave doesn’t reshape/tighten after wash cycle.

Warning: Despite the price, potential customers should expect no developed world level of service expected from this vendor. If you are dissatisfied after use or even after TRYING ON” they do not offer any return/exchange.Their response times are slow to requests/questions, it is disappointing. Your purchase is a true gamble.

The color was true to the picture. If I were an A or B cup or even if I hadn’t nursed two children, this bra may have suited better. Again, very comfortable and it would work well for sleeping for those who dont like to be all out there.

Hi Nancy, thank you for your detailed feedback. We’re glad to hear the bra was comfortable and true to color, but we’re sorry it didn’t provide the support you needed. We appreciate your honesty about sizing and fit, that’s very helpful for other customers. We also take your comments on service and return/exchange policies seriously and will continue working to improve in these areas. Your insights are truly valued.

J
Jessica
Doesn't maintain support and is a waste of money

100% disappointed in this "sports bra". It was good for about 2 weeks and then stretched out and lost all support. So much so that it gaps at the sides and back. Once washed it does shrink back into shape but as soon as it's worn it stretches right back out and is worthless as a sports bra again. I reached out to customer service and they assured me this was "Normal" and "not a defect". This is because there is no elastic in the bra. I get that. But shouldn't it be useful for more than 2 weeks?!! Their pathetic excuse for compensation was to offer a 15% discount on a future purchase. Why would I ever want to buy from you again when you don't stand by your product?

Hi Jessica, thank you for your feedback. The sports bra is designed with elastic to provide flexible support and comfort during activity. We understand that different bodies and routines interact with garments in unique ways, and we appreciate you taking the time to share your experience.

S
Sarah B.
The best!

I wanted to wait a few weeks to review this bra, so I could give an accurate review. This bra is the best! So soft, and it really DOESN'T SMELL- I haven't washed it in a few weeks and while I probably should, I just can't bring myself to do so because it has zero odor! My skin needed a few days to get used to the material, but now that it has it's like wearing no bra at all. I got a large which is good for walking and other low impact activities, but I would probably size down for running or jumping rope. Also, it is practically impossible to find a company that ACTUALLY doesn't use ANY plastic at all. So glad this brand exists.

Hi Sarah,
Thank you so much for taking the time to share such a thoughtful review! We’re thrilled to hear the bra has been so comfortable for you and that it’s living up to your expectations, even down to the fact that it stays odor-free. It means a lot that you appreciate our commitment to plastic-free materials, too. Your feedback on sizing is super helpful for others, and we’re so glad you found a bra you love!

S
Suzy
Great!

It’s everything I expected it to be! Super soft yet it keeps everything secure when I go running! I’ve been detoxing plastic/polyester and this has helped tremendously with that! Highly recommend to anyone who wants something soft, lightweight, and natural!

Hi Suzy! That’s amazing to hear, thanks so much! We're thrilled it's working so well for you, especially on your plastic-free journey.

L
Lindsey
Comfy!

Love these!

HI Lindsey
Thank you so much for your feedback! We're delighted to hear that you love the bra and find it comfortable. Your support means a lot to us!

L
Lindsey Duke
Supportive and comfy!

Love this bra! Soft and supportive!

Hi Lindsey
Thank you so much for your feedback! We're glad to hear you love the bra and that it's both soft and supportive, that means a lot to us!

L
Lynn Kehoe
comfortable

I already own two of these bras. I wear them for days on end sweating on the trail and at home. They don't need to be laundered frequently and are very comfortable no matter what the temperature. I won't buy any other bra in the future.

Hi Lynn,

Thank you for your review! We knew you’d love these bras—they're designed exactly for that kind of all-day comfort and performance. Whether you're sweating on the trail or just going about your day, they stay fresh and feel great. Sounds like they've found a permanent place in your wardrobe, and we’re not surprised! Enjoy many more adventures ahead!

S
SVM
Soft like butter

I barely notice I'm wearing this, it's so soft and light. Reasonable pricing too! I'm a 32 B and got size small, fits just right.

K
Karen Waldon
high back bra

Slightly disappointed with how high the back strap is on this bra--it's nearly above the base of the neck! Maybe you need to offer an extra large size. I do have a longer torso, so the bra barely makes it height wise. Loved the navy blue and the fabric is great.

J
Julie Dickinson
Soft, lightweight, comfortable, and supportive.

Soft, lightweight, comfortable, and supportive. I used the sizing chart and it fits great.