ghost string de sport sans couture hastko STRING N°19 #color_true-black
femme portant un string de sport sans couture hastko STRING N°19 #color_true-black
femme portant un string de sport sans couture hastko STRING N°19 #color_true-black
femme portant un string de sport sans couture hastko STRING N°19 #color_true-black
femme portant un string de sport sans couture hastko STRING N°19 #color_true-black
femme portant un string de sport sans couture hastko STRING N°19 #color_true-black
femme portant un string de sport sans couture hastko STRING N°19 #color_true-black
femme portant un string de sport sans couture hastko STRING N°19 #color_true-black
ghost string de sport sans couture hastko STRING N°19 #color_kaki
femme portant un string de sport sans couture hastko STRING N°19 #color_kaki
femme portant un string de sport sans couture hastko STRING N°19 #color_kaki
femme portant un string de sport sans couture hastko STRING N°19 #color_kaki
femme portant un string de sport sans couture hastko STRING N°19 #color_kaki
femme portant un string de sport sans couture hastko STRING N°19 #color_kaki
femme portant un string de sport sans couture hastko STRING N°19 #color_kaki
femme portant un string de sport sans couture hastko STRING N°19 #color_kaki
ghost string de sport sans couture hastko STRING N°19 #color_nude
femme portant un string de sport sans couture hastko STRING N°19 #color_nude
femme portant un string de sport sans couture hastko STRING N°19 #color_nude
femme portant un string de sport sans couture hastko STRING N°19 #color_nude
femme portant un string de sport sans couture hastko STRING N°19 #color_nude
femme portant un string de sport sans couture hastko STRING N°19 #color_nude
femme portant un string de sport sans couture hastko STRING N°19 #color_nude
femme portant un string de sport sans couture hastko STRING N°19 #color_nude
ghost string de sport sans couture hastko STRING N°19 #color_tuscany-bordeaux
femme portant un string de sport sans couture hastko STRING N°19 #color_tuscany-bordeaux
femme portant un string de sport sans couture hastko STRING N°19 #color_tuscany-bordeaux
femme portant un string de sport sans couture hastko STRING N°19 #color_tuscany-bordeaux
femme portant un string de sport sans couture hastko STRING N°19 #color_tuscany-bordeaux
femme portant un string de sport sans couture hastko STRING N°19 #color_tuscany-bordeaux
femme portant un string de sport sans couture hastko STRING N°19 #color_tuscany-bordeaux
femme portant un string de sport sans couture hastko STRING N°19 #color_tuscany-bordeaux
femme portant un string de sport sans couture hastko STRING N°19 #color_tuscany-bordeaux
femme portant un string de sport sans couture hastko STRING N°19 #color_tuscany-bordeaux
femme portant un string de sport sans couture hastko STRING N°19 #color_tuscany-bordeaux
ghost string de sport sans couture hastko STRING N°19 #color_ardoise
femme portant un string de sport sans couture hastko STRING N°19 #color_ardoise
femme portant un string de sport sans couture hastko STRING N°19 #color_tropico-blue
ghost string de sport sans couture hastko STRING N°19 #color_tropico-blue
femme portant un string de sport sans couture hastko STRING N°19 #color_tropico-blue
femme portant un string de sport sans couture hastko STRING N°19 #color_tropico-blue
femme portant un string de sport sans couture hastko STRING N°19 #color_tropico-blue
femme portant un string de sport sans couture hastko STRING N°19 #color_tropico-blue
femme portant un string de sport sans couture hastko STRING N°19 #color_ardoise
femme portant un string de sport sans couture hastko STRING N°19 #color_ardoise
femme portant un string de sport sans couture hastko STRING N°19 #color_ardoise
Size 1
Size 2
Size 3
ghost string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
ghost string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
ghost string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
ghost string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
ghost string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
ghost string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19
femme portant un string de sport sans couture hastko STRING N°19

string n°19

€39,00 €39,00
/
Tax included.
String No. 19 | Comfort & Ultra-light

Ultra-comfortable sports thong.
 Recycled materials. Trail running, climbing, CrossFit, tennis, yoga, running...

-20% off Tropico Blue. Pair with the True-black top. Limited edition. Last sizes available.

Color
Color
Size
Ruler icon FIND YOUR SIZE
Size
Size Guide
Size 1Size 2Size 3
€39,00 €39,00
/
TALLE
Size Guide
Size 1Size 2Size 3

Money back guarantee

You have 30 days after receiving your order to make a return.

femme portant un string de sport sans couture hastko STRING N°19 #color_true-black
femme portant un string de sport sans couture hastko STRING N°19 #color_true-black

STRING No. 19

So light you forget you're wearing it. So comfortable you remember it. It disappears to give free rein to your movement.

STRING NUMBER NINETEEN SECOND-SKIN EFFECT INVISIBLE UNDER YOUR CLOTHES
Ruler icon FIND YOUR SIZE

Technical details

  • The ultimate invisible comfort.
  • Ultra-breathable and very light. It dries in a flash.
  • Can be worn for high-performance sports or an active lifestyle.
  • Appointed by HASTKO in Chamonix-Mont-Blanc
  • Our UltraLight underwear line comes in different shapes and colors, to easily pair with all our sports bras.
Composition 75% recycled nylon – 25% elastane
Gusset 98% cotton - 2% elastane
Maintenance Wash at 30°C in a protective net. Do not tumble dry.

Quand on bouge pendant des heures

Un soutien ciblé qui s'adapte à votre corps et à votre mouvement.

Comfort and support you can feel

Un soutien ciblé qui s'adapte à votre corps et à votre mouvement.

“
Ultra-light and comfortable.
”

— Aurélie V., Wears STRING No. 19

Key Technologies

heat-sealingheat-sealingheat-sealing

Unconstrained performance.
3D printing3D printing3D printing

Moving freely is getting back to basics.
dot collagedot collagedot collage

Precise support, right where it counts.

Frequently Asked Questions

How to find the right size for STRING No. 19?

To choose the ideal size, please refer to our size guide available on this page.

How to care for your STRING No. 19 daily?

Wash at 30°C in a protective laundry bag. Avoid tumble drying, as well as the use of softeners and bleaches. Do not iron.

Does it dry quickly?

Our products are designed with breathable materials and incorporate mesh inserts, allowing for quick drying after exercise and washing.

Is the STRING No. 19 designed for durability?

Every style comes with a 2-year warranty: if there's an issue, we'll exchange it. Simple, quick. Because a good sports bra isn't chosen for a moment, but for thousands of movements.

Can I return the product if it doesn't fit?

No problem. You have 30 days after receipt to return an item. During the holiday season (November 15 → December 31), this period is extended to 60 days.

Join 30,000 Hastko customers

STRING No. 19

"Wonderful, I had stopped running because of chafing and erosion burns caused by my old sports bras, and now this top is a second skin, I'm living again, I'm running again, it's great!"

Nobili.S

STRING No. 19

"Very comfortable bra, feels like a second skin. Just trying it on while resting, it's nothing like my old bra: a feeling of lightness and comfort. After a while, I could barely feel it anymore. Plus, it's quite pretty and well-made! Thank you!! You won't be disappointed!"

Audrey.T

STRING No. 19

"Finally, effective and attractive sports underwear. A French brand that makes you dream, with values that align well with mine. I feel beautiful and strong wearing them, and nothing stops me from fully enjoying my sport."

Karin.W

STRING No. 19

"No chafing after my long runs, whereas with my other sports bras I was completely used to it. It's a pleasure, I don't feel it, it supports correctly, and on top of that, it's super pretty!"

Manon.R

Best sellers

Shop now
NEW
SPORTS BRA NO. 39 | Technical, ultra-comfortable, all-terrainSPORTS BRA NO. 39 | Technical, ultra-comfortable, all-terrain
SPORTS BRA NO.39 €99
SPORTS BRA N°38 | Firm supportSPORTS BRA N°38 | Firm support
SPORTS BRA SIZE 38 €89 €5340% OFF
String No. 19 | Comfort & Ultra-lightString No. 19 | Comfort & Ultra-light
STRING N°19 €39
SPORTS BRA N°42 | Ultra-breathable and anti-chafingSPORTS BRA N°42 | Ultra-breathable and anti-chafing
BRA N°42 €89
Tanga N°23 | Comfort & ultra-lightTanga N°23 | Comfort & ultra-light
TANGA N°23 €39
SPORTS BRA NO. 92 | Adjustable, very high supportSPORTS BRA NO. 92 | Adjustable, very high support
BRA No. 92 €99