• Vivenlo knee brace worn on the knee, close-up of the hinged support
  • Climbing stairs comfortably with the Vivenlo knee brace
  • How the Vivenlo knee brace works: side hinges, compression sleeve and patella gel pad
  • Kneeling in the garden with the Vivenlo knee brace
  • Vivenlo customer reviews card
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Vivenlo FlexGuard — Side-Stabilizer Knee Brace 2.0

Vivenlo FlexGuard — Side-Stabilizer Knee Brace 2.0

Side-stabilizer knee brace with patella gel pad — steady support for walking, work and workouts.
  • 15,000+ happy customers
  • 90-day guarantee
  • Fast & free shipping

What's in the box

  • 1 × FlexGuard knee brace (single sleeve — order two for both knees)
  • Built-in patella gel ring and two side spring stabilizers
  • Two adjustable hook-and-loop straps

Size guide

Measure around your thigh about 4 in above the kneecap, standing with your leg straight.

  • S: 13–15 in
  • M: 15–17 in
  • L: 17–19 in
  • XL: 19–21 in
  • XXL: 21–23 in
  • XXXL: 23–25 in

Between sizes? Choose the smaller one for firmer compression, the larger one for all-day comfort.

View full details
How the Vivenlo knee brace works: side hinges, compression sleeve and patella gel pad

Why it helps

Support where your knee needs it most

Most knee aches come from a kneecap that drifts and a joint that wobbles under load. FlexGuard wraps the joint in firm, breathable compression, holds the kneecap in place with a soft gel ring, and adds two side stabilizers that resist sideways movement — so stairs, long walks and gym sessions feel steadier.

Two adjustable straps let you dial in the fit in seconds, and the slim knit sits comfortably under jeans or work pants.

Choose your size

Built for real-life knees

  • Steadier every step

    Spring side stabilizers resist twisting and side-to-side wobble on stairs, slopes and uneven ground.

  • Kneecap stays put

    A soft silicone gel ring cushions the patella and keeps it tracking straight during walks and workouts.

  • Comfortable for hours

    Breathable knit, no-slip silicone edge and two adjustable straps — snug at 6 a.m., still comfortable at 6 p.m.

Questions, answered

Does it fit under pants?

Yes. The knit is slim and the stabilizers sit flat, so it fits under jeans, work pants and leggings without bulk. The silicone edge keeps it from sliding when you sit and stand.

How do I pick a size?

Measure around your thigh about 4 in above the kneecap while standing. S 13–15 in · M 15–17 in · L 17–19 in · XL 19–21 in · XXL 21–23 in · XXXL 23–25 in. If you're between sizes, size down for firmer compression or up for all-day comfort. Wrong size? Swap it free.

Is it machine washable?

Yes. Close the straps, wash cold (below 86°F) on a gentle cycle or by hand, and lay flat to dry. Skip the dryer and bleach to keep the compression and gel pad in shape.

What if it doesn't help?

Then it's on us. Wear it for up to 90 days — if you're not feeling steadier and more comfortable, contact support@vivenlo.com and we'll refund you in full. No forms, no restocking fees.

Our 90-day comfort guarantee

Try FlexGuard on your walks, at work and at the gym. If it isn't helping you move more comfortably within 90 days, send it back for a full refund — shipping is on us and there are no questions asked.

Get yours — free shipping