Assassins Knee Sleeves

Assassins Knee Sleeves

High-Quality Compression Knee Sleeve Ideal For Dead Lifts, Pistols And Squats
Specifically Designed To Provide Compression, Warmth And Lateral Stability
8.7  out of 10  (11 Reviews)
7 Options

8 Options
5mm Large
Price: $56.99 ( / Serving)
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Product Overview

Female Athlete Raising Dumbbell
Assassins by RockTape
Competition-Grade Knee Sleeves
Reebok CrossFit Games 2018 Official Sponsor

Get The Ultimate Workout Weapon, Assassins.

RockTape Athlete

NEW from RockTape, the ultimate weapon in workout domination – Assassins. An entirely new generation of knee sleeve, Assassins provide uncompromising support and protection allowing you to slay reps and crush WODs all while keeping your knees supported and protected.

Assassins are are available sized small through extra large, with two thickness options – 5mm and 7mm – for moderate (5mm) to extreme (7mm) support.

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Built For Competition

Assassins are designed with the unique needs of athletes in mind, and unlike sleeves from other companies, are much more than a re-purposed medical support.

The result is a pair of knee sleeves that are suitable for the most grueling workouts, lifting events, and obstacle course races – yet comfortable enough for the weekend warrior.

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Uncompromising Value

Workout gear should be reasonably priced and available to anyone. We also believe that every athlete deserves two sleeves – that’s why Assassins are always sold as a pair.

When stacked up next to the competition, Assassins quality and price can’t be matched.

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Pure Performance

Built extra tall, Assassins help ensure proper stability and tracking of the knee, and can often dramatically reduce non-specific knee pain, particularly during squats.

This also keeps sleeves in place – preventing excess slip and movement during workouts, a common complaint of competing sleeves.

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Nearly Indestructible

A synthetic fabric shell bonded to SBR neoprene and secured via double-mauser stitching keeps Assassins tightly supporting the knee joint through countless workouts.

If any pair of Assassins fails to carry out their purpose, RockTape offers the industry’s only one-year warranty against defects and premature failure from date of purchase.

Express Yourself With Unique Designs

Black Sleeves


Brick Wall

Red Camo

Red Camo Sleeves
Halftone Sleeves



Old Glory

Old Glory Sleeves
Red Gas
Crossfit Red Sleeves

Crossfit® - Red

Blue Liquid

Crossfit® - Blue

Crossfit Blue Sleeves
Assassin Sleeve Fit


  • Measure the circumference of your knee around the center of your patella.
  • Assassins start very snug and can take a few sessions to break in.
  • If you measure on the higher end of a size, we recommend ordering the next size up.
sm 10.5" - 12.5"
md 12.5" - 13.5"
lg 13.5" - 14.5"
xl 14.5" - Above

Ratings & Reviews

Overall Rating
11 Ratings
Verified Buyer Rating
8 Ratings
By clicking the button above, you agree to entering the Reviews section. Products in the Store are not intended to diagnose, treat, cure, or prevent any disease.
Jun 02, 2019
Verified Buyer

My girlfriend and I are both wearing them on leg day. She says her knees feel much better the next day, after wearing them. They fit pretty snug and give me confidence in what I am doing.

Mar 19, 2019
Verified Buyer

So far so good. I feel a ton of support when lifting very heavy.

Feb 24, 2019
Verified Buyer
No written review.
Jul 08, 2018
Verified Buyer

Yeah, I'm 6"8, I have legs like tree trunks... and these are hella tight. But I like the wear you can rest it on your shoe when your not working it. I use one on my bad knee... It's quick and fast to get on and off and it provides TIGHT support. I'm a big fan.

Apr 22, 2018

These sleeves WOULD be great if they didn't fall apart. First few sessions with them were fantastic, but the inside basically split and broke apart all through the support area. I'd say it was a one-off defect, but my training partner bought a pair and the exact same thing happened to his. It's a shame, had they have lasted more than 3-4 training sessions they'd be an easy 9/10

Apr 02, 2018
Verified Buyer

The measurement is off. It's way off. For male, unless you have a pin-leg, get XL and bigger. Start from there. I bought large to be safe, to get a tight fit, but I can barely get it on.

Aug 11, 2017
Verified Buyer

I have really messed up knees, so I wanted something with just a little extra support that would be versatile without spending a fortune for a pair. Rocktape seemed to fit the bill well so I gave them a shot. They're comfortable, excellent support for these bad knees (I LOVE squats, and they work for it) and they look cool (I got the skulls!). HOWEVER..... The sizing is a little inadequate. I don't have huge legs and my knee measured out to 16.25". The XL set is 14 1/2 "and above". If I'm dried out and not holding water I'm fine, although they're snug. But, if I have some water retention or or I'm refeeding then they don't really fit at all, which is a bummer because they're so supportive. Hopefully they'll break in really well and be a little more lenient on the sizing.

Jul 23, 2017
Verified Buyer
No written review.
May 31, 2017
No written review.
May 25, 2017
Verified Buyer
No written review.
Jan 02, 2017

These knee sleeves are by far my favorite ever used!! They are comfortable and give me great support on my heavy lifts, which I'm doing more and more of all the time. Assassins are a game changer and if you haven't used them you most definitely should!

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