New for 2017!
Asterisk Ultra Cell Knee Brace
  • Asterisk Ultra Cell Knee Brace
  • Asterisk Ultra Cell Knee Brace - Pair/Black
  • Asterisk Ultra Cell Knee Brace - Pair/White
  • Asterisk Ultra Cell Knee Brace - Pair/Red
  • Asterisk Ultra Cell Knee Brace - Left/White
  • Asterisk Ultra Cell Knee Brace

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Size Chart
$399.50 - $799.00
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Asterisk Ultra Cell Knee Protection System

Combining the latest revolutionary patented design concepts, the Ultra Cell Knee Brace is without question the most technologically-advanced Knee Protection System available. The UltraCell is built on 10+ years of time-tested and proven designs of the original Cell Knee Protection System. Those original concepts have been refined, improved, and re-engineered to create the UltraCell.

The UltraCell is completely customizable, yet remains extremely rigid to prevent injury. The BOA Technologies fastening system, natural free-motion hinge, tibial plateau-capturing frame design, brace-to-boot tether attachment, and a full time-full coverage patella cup set the Asterisk Ultra Cell knee brace decades ahead of the rest.


A.C.M. Frame

  • Anatomically correct design
  • Carbon fiber epoxy matrix
  • Rigid & lightweight, impact distributing structure

Asymmetry Glide Hinge

  • Tracks the natural "rolling-gliding" motion of the knee joint
  • Asymmetrical design allows each hinge to set properly 
  • Allows for automatic tibia alignment of lower frame
  • Adjustable ext. regulator from 0º to 30º
  • Condyle shims for fine tuning fit

A.R.C. Cuff

  • Adjustable retention control
  • Multiform rigid lateral support
  • Built in anti-rotation connection
  • Stainless steel retention strips 
  • Inverted adjustment increases lateral rigidity
  • Thermo-Formed EV50 shock absorbent foam padding

Anti-Rotation Tether

  • Links the brace to the boot making them work together as one
  • Transfers forces of a lower leg rotation
  • Adjustable to suit each individual

Dual Independent Securement system

  • Medial macro-adjustment
  • Superior security to strapping
  • BOA System provides smooth even closure and no pressure points
  • Quick Release tabs

Tele-tri Patella cup

  • Telescoping three piece design
  • Easily removable
  • High impact nylon 6 material
  • Full range of motion coverage of the knee cap
  • Thermo-formed EV50 Shock absorbent foam padding

Thermo-formed padding

  • Thermo-formed for precise fit
  • Forms to leg shape using your body heat
  • Easy cleaning

Water Resistant

  • Non-corrosive metals
  • Non-corrosive composites
  • Hand washable soft materials

Undersleeves (Included with braces)

  • Conically tapered cut to match the legs’ natural contour
  • Ventilated mesh promotes air flow Reduces heat build up by wicking moisture away from skin
  • Flat stitched quad seam for a smooth, durable finish
  • Durable fold-over elastic band
5 / 5
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
5 / 5
4 / 5
4 / 5

Mens Knee Brace

Sizing Notes!

Locate the middle of the kneecap and measure around the leg. Measurements should be taken directly on the skin with a straight leg supporting your full body weight using a soft tape measure. (If soft tape measure is not available, a piece of string or yarn may be used to calibrate the leg's diameter.)

Size Knee Circumference (cm)
SM 33.02-35.24
MD 35.56-37.78
LG 38.1-40.32
XL 40.64-42.86

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.

How To Measure

Product Style RevZilla Item # Manufacturer Product # Availability
Pair/Black / LG 1203994 AST-UC-LG-BK-P Only 1 Left: Ships within 24 hours
Pair/Black / MD 1203993 AST-UC-MD-BK-P Only 1 Left: Ships within 24 hours
Pair/Black / SM 1203992 AST-UC-SM-BK-P Only 2 Left: Ships within 24 hours
Pair/Black / XL 1203995 AST-UC-XL-BK-P Only 3 Left: Ships within 24 hours
Pair/White / LG 1203990 AST-UC-LG-WH-P Only 1 Left: Ships within 24 hours
Pair/White / MD 1203989 AST-UC-MD-WH-P Out of Stock
Pair/White / SM 1203988 AST-UC-SM-WH-P Only 1 Left: Ships within 24 hours
Pair/White / XL 1203991 AST-UC-XL-WH-P Only 2 Left: Ships within 24 hours
Pair/Red / LG 1203986 AST-UC-LG-RD-P Only 2 Left: Ships within 24 hours
Pair/Red / MD 1203985 AST-UC-MD-RD-P Out of Stock
Pair/Red / SM 1203984 AST-UC-SM-RD-P Only 1 Left: Ships within 24 hours
Pair/Red / XL 1203987 AST-UC-XL-RD-P Only 2 Left: Ships within 24 hours
Left/Black / LG 1204014 AST-UC-LG-BK-L Out of Stock
Left/Black / MD 1204013 AST-UC-MD-BK-L Out of Stock
Left/Black / SM 1204012 AST-UC-SM-BK-L Out of Stock
Left/Black / XL 1204015 AST-UC-XL-BK-L Out of Stock
Left/White / LG 1204006 AST-UC-LG-WH-L Out of Stock
Left/White / MD 1204005 AST-UC-MD-WH-L Out of Stock
Left/White / SM 1204004 AST-UC-SM-WH-L Out of Stock
Left/White / XL 1204007 AST-UC-XL-WH-L Out of Stock
Left/Red / LG 1203998 AST-UC-LG-RD-L Out of Stock
Left/Red / MD 1203997 AST-UC-MD-RD-L Out of Stock
Left/Red / SM 1203996 AST-UC-SM-RD-L Out of Stock
Left/Red / XL 1203999 AST-UC-XL-RD-L Out of Stock
Right/Black / LG 1204018 AST-UC-LG-BK-R Out of Stock
Right/Black / MD 1204017 AST-UC-MD-BK-R Out of Stock
Right/Black / SM 1204016 AST-UC-SM-BK-R Out of Stock
Right/Black / XL 1204019 AST-UC-XL-BK-R Out of Stock
Right/White / LG 1204010 AST-UC-LG-WH-R Out of Stock
Right/White / MD 1204009 AST-UC-MD-WH-R Out of Stock
Right/White / SM 1204008 AST-UC-SM-WH-R Out of Stock
Right/White / XL 1204011 AST-UC-XL-WH-R Out of Stock
Right/Red / LG 1204002 AST-UC-LG-RD-R Out of Stock
Right/Red / MD 1204001 AST-UC-MD-RD-R Out of Stock
Right/Red / SM 1204000 AST-UC-SM-RD-R Out of Stock
Right/Red / XL 1204003 AST-UC-XL-RD-R Out of Stock


Orders $39.99 and over qualify for our fast free shipping offer. Click Here for FREE Shipping Terms and Conditions.

Please see our International Orders page for orders shipping outside the US.

We show real-time availability on this product page when you select the size/color item you want.  Most items will ship the same business day an order is placed,however if an item requires additional processing time a message will be shown indicating such.

See our full Shipping Policy for further details.


If your order arrives and it is not right, we will we'll fix it, NO NONSENSE, we promise.

Doesn't fit or just not happy with it? You can return any new, unused and unaltered item within 30 business days of delivery receipt of your item. We will issue a full refund to your original payment method.

See our full Return Policy for all of the pertinent details.

Write a Product Review for a chance to win our monthly $100 giveaways.
5.0 / 5.0
1 Review
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
Bang For The Buck
5.0 / 5
Protection & Durability
5.0 / 5
5.0 / 5
4.0 / 5
4.0 / 5
Bang For The Buck
5 / 5
Protection & Durability
5 / 5
5 / 5
4 / 5
4 / 5
Good Braces
I have had bilateral ACL repairs twice, so a good knee brace is important to me. The Asterisk Ultra Cell addresses the rotational component that was involved in both of my knee injuries, with their tether system. I have to admit, I was tentative about taking a 3/16th drill bit to my relatively new Alpine Stars Tech 7's and cutting holes in my riding pants, but it worked out good. I also purchased the Asterisk base layer for keeping the braces in place. I would recommend them over the sleeves they come with. The boa system works great and the braces are fairly comfortable once you dial them in. They are kinda of bulky, but that is just how all of the braces are. I really did not notice them much on the first ride with them, Toward the end of a four hour ride the left one began to dig in a little at the calf but that should be corrected with some fine tuning with the adjustments. I am happy with my purchase and feel more confident riding off road with the braces on. No brace is perfect, but these seem to be the most protective on the market.
September 4, 2017
2 months ago
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Why did you choose this?
RevZilla Store
Did a extensive and deep market investigation and Asterisk has the best "from shelf" protection technology. Hope to get what I read.
ALMA R N on Oct 10, 2017
Did a extensive and deep market investigation and Asterisk has the best "from shelf" protection technology. Hope to get what I read.
ALMA R N on Oct 10, 2017
Where can i try theese on?
Steve S on May 10, 2017