• ForceFlex Knee Sleeves Black, 1 pair
  • ForceFlex Knee Sleeve Black, side view
  • ForceFlex Knee Sleeve Black, silicone grip band inside the top
  • ForceFlex Knee Sleeves Black Red, 1 pair
  • ForceFlex Knee Sleeve Black Red, side view
  • ForceFlex Knee Sleeve Black Red, silicone grip band inside the top
1 6
New · Leg day
ForceFlex Knee Sleeves
$48.00 CAD
$73.52 CAD $48.00 CAD
SALE
SOLD OUT

Snug compression that stays put. Warm knees from the first warm up set to the last rep.

  • Firm, even compression around the knee
  • Silicone anti slip band, no rolling down
  • 1 pair, sized by body weight for men and women
Color
Black
Size
M
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Why sleeves

Warm knees from the first rep.

Cold knees feel stiff on the first sets, and cheap sleeves slide down by the second. ForceFlex wraps each knee in snug, warm compression that stays exactly where you put it.

Warm knees
SquatsLunges, runs, court sports
3Sizes by weight
4 wayStretch knit
2Sleeves per pair
Snug compressionEven pressure around the knee for a supported, locked in feel.
Silicone anti slip bandGrips your leg so the sleeve does not roll down mid set.
Breathable knitAir moves through the weave, so your knees stay warm, not soaked.
Men and womenThree sizes by body weight, from 45 to 90 kg.
Made to stay put. 123

Up close

Made to stay put. Set after set.

Pull it on once. The details below keep it snug, breathable and in place until your last rep.

  1. 1
    Silicone grip bandTwo wavy silicone lines inside the top cuff hold the sleeve to your leg so it does not roll down.
  2. 2
    Breathable 3D knitZoned knit that stays snug around the knee and lets air move through the weave.
  3. 3
    Even, snug compressionWarm, locked in feel from the warm up set to the last squat. Three sizes so it fits right.

Fit and sizing

Find your size in 5 seconds.

Sized by body weight, so you get it right the first time. Slide to your weight and we pick it for you.

Size finder

Slide to your body weight. We match it to the size chart.

70kg
L
Size L fits youFor 60 to 75 kg.
M45 to 60 kg99 to 132 lb
L60 to 75 kg132 to 165 lb
XL70 to 90 kg154 to 198 lb

How to wear them

  1. 1
    Pull on from the footSlide the sleeve up your leg like a sock, silicone band at the top.
  2. 2
    Center it on the kneeThe kneecap sits in the middle, the pattern facing forward.
  3. 3
    Smooth it outRun your hands up and down so there are no folds behind the knee.
  4. 4
    Warm up and liftThe silicone band keeps it in place set after set.

!Between two sizes? Pick the smaller one for a firmer hold, the larger one for an easier fit.

Nothing hidden.

Specs

Nothing hidden.

Exactly what arrives at your door.

Fabric
60.1% nylon, 19.6% elastic fiber, 19.5% polyester, 0.8% spandex
Knit
Breathable, four way stretch
Grip
Silicone anti slip band
Sizes
M, L, XL by body weight
Colors
Black, Black Red
In the box
1 pair (2 sleeves)
SquatsLungesLeg dayRunningHikingCyclingCourt sports

Compared

ForceFlex vs the usual.

 
BestForceFlex
Bare knees
Thick neoprene
Warm, compressed feel on every set
Stays up with a silicone grip
Breathable knit
Full range of motion
Easy to pull on and off
Thin enough under pants
Score
6/6
4/6
1/6
YesSort ofNo

Straight answers

What lifters ask before they buy.

Short answers first. Tap for the detail.

Which size should I get?Pick by body weight: M 45 to 60 kg, L 60 to 75 kg, XL 70 to 90 kg.
Use the size finder on this page and it selects the size for you. Between two sizes, go smaller for a firmer hold or larger for an easier fit.
Will they slide down?No. A silicone band grips your leg.
The band on the inside of the top edge holds the sleeve in place through squats, lunges and runs.
Do they help with knee pain?They add warmth and compression, nothing more.
Many lifters like the warm, supported feel. They are not a medical device and do not treat injuries. If you have knee pain or an injury, talk to your doctor first.
Can I run or play sports in them?Yes.
The knit breathes and stretches four ways, so they work for running, hiking, cycling and court sports as well as leg day.
What do I get?1 pair. Two sleeves, one for each knee.
Choose Black or Black Red, in M, L or XL.
How do I wash them?Hand wash in cold water, air dry.
Skip the dryer so the knit and silicone band last longer.
When does my order ship?Ships in 1 to 3 business days.
You get a tracking link by email as soon as it leaves.
What if the size is wrong or I don't like them?Send them back within 30 days for a full refund.
Any reason. Email us and we take care of it.
Still unsure? Talk to us.Use live chat during working hours, or email us any time.
info@optiiforce.com

The Force System

Complete your leg day.

Gear that works as hard as you do. Add any piece in one tap.

Pairs with itForceLock Straps
ForceLock Straps

Locks the bar to your hands. Padded wrist, non slip grip.

$35.00$52.31
Heavy daysOptiiForce ForceLock™ Lever Belt
ForceLock™ Lever Belt

Built for heavy sets. Locks in with one lever.

$93.21$125.88
GripOptiiForce ForceGrip™ Liquid Chalk
ForceGrip™ Liquid Chalk

Dries in seconds. Locks your hands to the bar.

$20.31$25.39
Best sellerOptiiForce MagForce Bag™ V2
MagForce Bag™ V2

Sticks to any steel rack. Phone, bottle and keys at hand height.

$70.01$115.28
Best sellerOptiiForce™ Magnetic Bottle
Magnetic Bottle

Snaps to any steel. The lid holds your phone and spins 360°.

$66.20$92.65
RecoveryOptiiForce ReachGun™
ReachGun™

Reach your own back after training.

$60.61$87.55

A note from the founders

Your knees carry every rep.

OptiiForce started in Toronto with a lot of gym time. We added ForceFlex Knee Sleeves for leg day. Here is what we promise every lifter.
  • 1
    Read by a humanEvery email is answered by our team, never a bot.
  • 2
    30 days to decideTrain with them. If they do not earn their place, send them back.
  • 3
    Honest specsWhat you read on this page is what arrives at your door.
OF
The OptiiForce foundersToronto, Canada
30day money back

Warm knees. Heavy squats.

Train in them for 30 days. If they do not earn their place in your bag, or the size is wrong, send them back for a full refund.

$48.00  $73.52 · 1 pair, 2 sleeves
30 day money backAny reason, full refund.
Ships in 1 to 3 daysTracking sent by email.
Secure checkoutEncrypted payment.
Real human supportEvery email answered by our team.