Excellent4.8/5

The adjustable knee sleeve that helps sore, arthritic knees feel steady on stairs.

  • Tighten or loosen in seconds with one dial
  • Stays put with a non-slip grip
  • Slim enough to wear under pants
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Free US shipping · 90-day money-back guaranteeFree US shipping · 90-day guarantee

Man walking on a sidewalk wearing the PeakFlex Knee Sleeve
Free US ShippingOn every order
90-Day GuaranteeNot happy? Get your money back
Orthopedic DesignDeveloped to orthopedic principles
Easy ReturnsIf it isn't the right fit

Does this sound familiar?

Sore knees change through the day. Most sleeves don't.

  • Stairs feel shaky

    You hold the railing and take them one step at a time.

  • Swollen mornings, fine by noon

    One fixed sleeve is too tight early and too loose later.

  • Sleeves that slide down

    You spend the day pulling it back up.

PeakFlex was built for all three. A dial you can tighten or loosen in seconds, and a non-slip grip that stays put.

Man stepping up outdoor steps wearing the PeakFlex Knee Sleeve

Get steadier knees in 3 simple steps

  1. 1
    Find your size

    Match your body weight to our size chart. It takes 30 seconds.

  2. 2
    Slip it on

    Pull it over your knee and turn the dial until it feels right.

  3. 3
    Get back to your day

    Stairs, walks and errands with a knee that feels steadier.

Best sellers

Start here.

These are the ones people buy most.

Designed with a knee specialist

Made with joint specialists. Tested by people with real knee pain.

Most people with sore knees don't need a stiff brace. They need support that keeps them steady and is comfy enough to wear every day.

Daniel M.

Knee Support Specialist
PeakFlex advisor

  • Designed for sore knees
  • Cushions the kneecap
  • Support on both sides of the knee
  • Won't slide down your leg
Daniel M., knee support specialist, holding the PeakFlex Knee Sleeve
Close-up of the knit fabricClose-up of the finished edgeClose-up of the dial and lacesClose-up of the padded kneecap area

Soft enough
to wear all day

A support only helps if you wear it. Ours is flexible, light and slim enough to wear under most clothes.

DEVELOPED TOORTHOPEDICPRINCIPLES90DAYSGUARANTEEALL-DAYCOMFORT
Learn More

Real people, real knees

4.8Average rating
What customers mention most
  • Holds the knee in place
  • Better stability
  • Fast, friendly support
PeakFlex in use
  • Knee sleeve worn at home
  • Holding the PeakFlex Knee Sleeve
  • Knee massager in use at home
  • Knee sleeve worn on a walk
  • Knee massagers in use on the sofa
  • Knee sleeve worn at home
  • Knee massager in use in the evening

I have Grade 4 knee arthritis

I have Grade 4 knee arthritis. I was searching for a support device that would alleviate the pain. I tried the Peakflex support and it has worked as advertised. Thank You Peakflex.

Stu P.

I have had Numerous Knee Replacements…

I have had Numerous Knee Replacements and on my Knees and I do not have the strength and Stability like I wish. Once I seen these & Recieve a Set of Braces for my Knees they held my Knees more secure and I had better Stability and now I'm on my way back to getting my Strength back in my Knees & Legs, Thank you Peakflex for a Great Product.

Harry H.

Knee Braces work as advertised

I’m sorry I didn’t buy these knee braces months ago. They are just as advertised. They hold the knee in place. … Customer service is easy to get in touch with, and help you. This is a quality product and a great company, I would buy again!

Peter M.

My experience with peak flex has been…easy and pleasurable

My experience with peak flex has been extreamly satisfying! I made the mistake of ordering my right and left knee brace a size larger than what I needed.i was going of the the weight scale.but once I emailed peak flex,they responded in less than 24hrs.within 48hrs they had came up with a resolution to my problem.peak flex was apologetic,respectful,and fast with a resolution.not to mention,their product is amazing in its performance and the quality was top notch.i would do buisness with them anytime as well recommend them to other buyers.

Manuel W.

Peakflex is wonderful

Peakflex is wonderful! I ordered two sets of knee braces but accidentally selected four left-side braces in size large. I reached out to their customer service team, and they were incredibly helpful, they’re replacing them with the correct medium size and completely free of charge. That is what I call great customer service. Thank you, PeakFlex

Karla G.

Why people choose PeakFlex.

No miracle claims. Just honest support and a guarantee that has your back.

20k+Happy customers
4.8/5Average rating
90Day money-back guarantee
$0Shipping on every US order
They held my knees more secure and I had better stability.Harry H. | PeakFlex customer
They held my knees more secure and I had better stability.Harry H. | PeakFlex customer
Steadier on stairsAdjusts to swellingWon't slide down
Smiling PeakFlex customer wearing the Knee Sleeve

PeakFlex vs. an ordinary knee sleeve

Most knee sleeves give you one fit for the whole day. Here is what is different.

PeakFlexKnee Sleeve
Ordinaryknee sleeve
Change the fit during the day
One‑hand dial
One fixed tightness
Kneecap support
Padded kneecap areaPadded kneecap
Usually none
Side support
Built-in side stabilizersSide stabilizers
Usually none
Stays in place
Non-slip grip
Often slides down
Sizes
7 sizes, S to 4XL
–Varies
Try it risk-free
90-day money-back guarantee90-day guarantee
–Varies

The both‑knees bundle

Two sore knees? Get one for each and pay less per sleeve.

Man wearing a PeakFlex Knee Sleeve on each knee

Size Guide

Find your size in 30 seconds

PeakFlex Knee Sleeves in three sizes

Support for every sore spot

Knee supportsKnee Foot supportsFoot Lower back supportsLower Back Recovery productsRecovery

Got questions?

Can't find your answer? Write us.

How do I pick my size?

For the Knee Sleeve, pick your size by body weight, from S (110 to 130 lbs) to 4XL (301+ lbs). Not sure? Write us before you order.

Can I change how tight it feels?

Yes. Make it tighter for stairs and long walks, and looser when your knee feels swollen. It only takes a few seconds.

How long can I wear it?

All day. Take it off at night. If anything feels numb or tingly, loosen it a little.

Will it help if my knee is "bone on bone"?

Many people with bone-on-bone knees wear it for extra steadiness when they move. It won't repair cartilage, but support that keeps the knee steadier can make stairs and walks feel more comfortable. If you're unsure, ask your doctor.

When will I feel a difference?

Most people notice the extra support the first time they walk in it. Give it a few days of regular wear to find the fit that feels best for you.

What if it doesn't work for me?

You're covered by our 90-day money-back guarantee, starting the day your order arrives. Email us at info@trypeakflex.com and we'll walk you through it.

How long does shipping take?

Orders leave in 1 to 3 business days. US delivery usually takes 5 to 12 business days, and you get a tracking number by email.

Which product is right for me?

Start with where it hurts. For knees, most people pick the PeakFlex Knee Sleeve. For feet, the Footsleeve. For the lower back, the Orthobelt.

How do I wash it?

Hand wash in cold water and let it air dry. No dryer. Heat ruins the stretch.

Ready for steadier steps?

Find your size in 30 seconds, then try it at home.

  • Free US shipping
  • Easy returns
  • 90-day money-back guarantee
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