Women's | Lightweight | Full-Length

K1 Flux

Supportive Tight

$448.00 Sale
Women's K1 Flux

Women's | Lightweight | Full-Length

K1 Flux

Supportive Tight

$448.00 Sale
Colour Black
Size XS

The only base layer with adjustable medical-grade knee support that's designed to help you overcome injuriesminimize pain, and get back to activity. Engineered with 90 feet of high-strength cables, adjustment dials and targeted compression, the K1 Flux reinforces the knees, hips, and lower back to keep you active for as long as possible. 

Trusted by 25,000+ customers, the K1 Flux is best for all-purpose use, with knit ventilation to keep you cool in any environment. It's lightweight, machine washable and easily wearable for any activity. 

  • Medical-Grade Knee Support
  • Cooling Ventilated Fabric
  • Full Length

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Free Shipping

60-Day Risk Free Trial

1-Year Warranty

Support Cables

90 feet of flexible, high-strength cables hidden in the fabric support and stabilize your knee.

Adjustment dials

Two dials hidden in the waistband allow you to adjust the support for any instability or activity.

targeted compression

Increased compression targeting the knee, improves blood flow, stability, and exercise recovery.

  • Medical-Grade Knee Support
  • Adjustable Support Dials
  • Cooling Ventilated Fabric
  • Targeted Compression
  • Full length

All-Purpose Use

  • Everyday Activity
  • Court & Field
  • Golf

Intended Use

  • The STOKO SUPPORTIVE TIGHT is intended for stabilization, support, and protection of the knee.

Medical Indications

  • Knee pain
  • Knee instability
  • Knee ligament instabilities (including ACL, MCL, LCL, and PCL)
  • Knee strains and sprains
  • Knee osteoarthritis
  • Patellofemoral pain syndrome (PFPS)


Material Contents

  • 79% Nylon
  • 21% Lycra

Product Care

  • Wash in Provided Wash Bag
  • Wash on Gentle Below 40°C
  • Hang to Dry

Supportive Apparel is like nothing you've ever worn before. So before you step into your new pair of Supportive Tights, throw away your expectations on how athletic apparel should be sized. 

Supportive Apparel sizing is determined by height and weight which helps us predict both the fit of the garment and the cable support system. By using height and weight, we can accurately determine the length and position of the cable support system which is not possible with traditional athletic apparel sizing. 

Find your size with our size picker or by looking at our size chart. You can find the size picker above where it says "Find your size" next to the size selections. If you find yourself on the border of sizes, we recommend sizing up. 

Learn more about what to expect during your first wear and consult the frequently asked questions on our sizing, fit and first wear page.

The K1 Flux is designed to help you overcome injuries, minimize pain and regain the confidence to move. Intended for multi-activity use, the K1 Flux is ultra-versatile and is great for court sports, golfing, strength training, fitness classes, walking or everyday use.

The integrated Stoko Support System reinforces the hips and lower back as well as provide medical-grade support for both knees. It’s adjustable, lightweight, machine washable and provides less bulk than traditional knee braces at a fraction of the cost.

Trusted by Olympians, professionals and weekend warriors, Outside Magazine praised the tight by saying it provides “Life-changing support to get people back to activity". 

Stoko Supportive Tights are priced in connection with their advanced technology, extensive research, and high-quality materials that go into their design. With features like 90 feet of Dyneema® cables and a patented support system, these tights offer a never-before-seen lower body support system, providing value that surpasses traditional athletic wear and knee braces. Trusted by professional athletes and medical experts, they deliver exceptional performance, making them an investment to stay active by helping you overcome injuries, minimize aches and pains and regain the confidence to move.

- Dual Functionality: Combines high-quality athletic tights with adjustable medical-grade knee support.

- Innovative Technology: Features 90 feet of Dyneema® cables and a patented support system.

- Full Lower body: Supports both knees, hips, and lower back, staying lightweight and machine washable.

- Endorsements: Trusted by professional athletes and recommended by medical professionals.

- Risk-Free Incentives: Includes a 60-day money-back guarantee, free shipping and a 1-year warranty. 

Why The Price?


The K1 Flux packs a lot of hidden technology and is so much more than a compression tight.

Flexible Support Cables

90ft of high-strength cables offer medical-grade knee bracing.

Adjustment Dials

Adjust the support in each leg for any level of instability or activity.

Flexible Support Cables

90ft of high-strength cables offer medical-grade knee bracing.

Adjustment Dials

Adjust the support in each leg for any level of instability or activity.

Targeted Compression

Higher compression at the knee supports faster exercise recovery.

 Cooling Ventilated Fabric

Comfortable, breathable fabric with knit ventilation.

"Life-changing support to get people back to activity."

Outside Magazine


Stoko's Supportive Apparel is worn by all types of active people including world-class athletes, professionals and weekend warriors looking to overcome injuries, minimize pain and move with confidence.

Confidence-Inspiring Support

Get active & stay active with support that helps you overcome injuries, minimize pain, and gives you the confidence to keep going.
Read the findings from our customer survey here.


More Knee Support


Less Knee Pain


Reported Hip & Back Support

More Activity. Less Pain.

"I was forced to give up squash because of a knee injury, but now here I am back at it. I have three pairs, my squash pair, my tennis pair and my skiing pair!"

- Deidre, Avid Squash Player

Bracing without the bulk

Supportive Apparel redefines traditional knee bracing, offering support and stabilization but with added benefits to keep you moving longer.

  • Packable
  • Comfortable
  • Machine Washable

Customer Reviews

Based on 44 reviews
Angela M.
Great Support System

I purchased the K1 Summit for skiing and loved it so much, I purchased the K1 Flux for other activities: weight training, hiking, mountain biking & golf. The Stoko products have reduced my knee pain substantially during activity. Unfortunately, Canada Life has denied my medical claim for reimbursement because they are not constructed with steel or rigid plastic. I am appealing that decision, and still recommend the product.

Rhonda F.
Great tights!

Love these tights! I have had multiple knee surgeries, back surgeries and a hip replacement. These tights make me feel so much better! I’m nearing 70, and they provide great support and comfort!

The knee & hip support for the future

I started using the K1 Flux support tights in December 2024. I have a bad knee due to age, arthritis, and over use. I started walking with the tights to get used to the mechanism. I quickly moved to a slow jog and now at 60 years of age, I am confidently back to running.
The support and confidence I feel while wearing these tights is like no other!
Very affordable and leads you back to an active lifestyle!

Well done Stoko!!!

Cynthia B.
A game changer

A tennis enthusiast, have struggled with mobility wearing two knee braces to play comfortably. No more. Ordered my second pair, a game changer. Could not walk comfortably on the beach without supportive braces, no more.

Cynthia B.
A game changer

A tennis enthusiast, have struggled with mobility wearing two knee braces to play comfortably. No more. Ordered my second pair, a game changer. Could not walk comfortably on the beach without supportive braces, no more.

Still Have Questions?

Stoko accepts returns & exchanges within 60 days of the purchase date. 

We encourage you to put your Supportive Apparel to the test before deciding to return. Move in them, get sweaty, and give them all you got. There is a short break-in period with your Supportive Tights. This means it will take a bit of time before your tights begin to regulate and feel comfortable on your body. They can be a total pain at first and challenging to get used to, Supportive Apparel is very different than any other tights or braces you’ve tried. 

View Full Policy Terms

Stoko offers shipping within North America, please note that order processing may take an additional 1-2 business days from the stated shipping times below:

  • Standard Shipping 6-10 Business Days
  • Express Shipping 2-5 Business Days 

International ShippingAt this time, we cannot ship or sell Stoko products outside of North America. Please feel free to sign up for our newsletter to keep up-to-date as we continue to grow.

More information Here

Our products are registered as Class 1 Medical Devices through Health Canada and the FDA, which means that all our products are eligible for reimbursement through Health Spending Accounts (HSAs) and Flex Benefit Plans by all Canadian insurers, as well as some carriers in the U.S. This allows many of our customers to get their K1s free of charge or receive partial reimbursement.

Learn More

All Stoko products provide the same medical-grade bracing support, leveraging our Stoko Support System technology. It is really up to your personal preference what style would suit you the best!

All-Purpose: K1 Flux is engineered to deliver support in a variety of activities and is our most recommended product for all-around use. From everyday activity to court sports to golf, the K1 Flux can do it all while also keeping you cool with knitted ventilation.

Ski & Snow: K1 Summit is engineered to deliver support and warmth. It was designed for snow sports, such as skiing, snowboarding, and cross-country skiing.

Run & Hike: K1 Tempo is engineered to deliver support and keep you cool in warm environments, such as: running, hiking, and training.    

Similar to other traditional/medical grade knee braces, the Supportive Tight provides support and stability to the body in compromised knee positions; however, the Supportive Tight achieves these outcomes through different means. The Supportive Tight relies on tension throughout the Stoko Support System to generate support, which is made up of cables that are integrated into the tights. The result is support that moves with your body and doesn’t compromise on comfort, aesthetics, or support.

Learn More Here

You can reach our Support Team at hello@stoko.com

Stoko Support Center