Asterisk - Ultra Cell 4.1 Knee Brace (Pair)

Asterisk – Ultra Cell 4.1 Knee Brace (Pair)

The Asterisk Ultra Cell 4.1 Knee Braces bring back the proven performance of the 4.0, now refined into a lighter, more streamlined design. This new hybrid version keeps everything riders loved about the 4.0 — pro-level protection, superior comfort, and an unbeatable fit — but eliminates the internal liners for a slimmer feel and easier fit inside modern, tighter riding pants. The result? A more accessible, field-serviceable brace that delivers elite protection at a lower cost without sacrificing function or durability.

Built around Asterisk’s A.C.M. (Anatomically Correct Matrix) carbon fiber epoxy frame, the Ultra Cell 4.1 provides incredible strength with minimal weight. The Asymmetri-Glide hinge mirrors the natural “rolling-gliding” motion of your knee joint, keeping alignment perfect while allowing smooth, unrestricted movement. The adjustable extension regulator lets you fine-tune your range of motion from 0°–30°, and condyle shims help dial in a precise fit for every leg shape.

The A.R.C. (Adjustable Retention Control) cuff provides multiform lateral support, helping stabilize the knee through impacts and sudden direction changes. Asterisk’s patented Anti-Rotation Tether links the brace to your boot, transferring rotational forces away from the knee to help prevent ligament injuries. The Tele-Tri Patella Cup, made from high-impact Nylon 6 and EV50 shock-absorbing foam, protects the kneecap across a full range of motion — and its three-piece design collapses neatly under tight riding gear. Built from non-corrosive metals and composites, the Ultra Cell 4.1 is fully water-resistant, easy to wash, and simple to repair with parts available directly from Asterisk’s U.S. factory.

Why We Like It:
The Ultra Cell 4.1 hits the sweet spot between pro-level protection and real-world usability. It’s lighter, cleaner, and easier to wear under tight gear, yet still offers that unmistakable Asterisk stability and confidence. Everything feels engineered for the rider — from the hinge motion to the collapsible patella cup — and the option to repair or upgrade parts makes it a long-term investment that pays off every ride.

Why It’ll Work for You:
Whether you’re racing, trail riding, or just logging seat time, the Ultra Cell 4.1 gives you serious protection without the bulk or stiffness of older designs. The carbon matrix frame spreads impact forces evenly, while the anti-rotation tether helps keep your knee stable during awkward landings or slips. The stripped-down liner-free design slides easily under slim riding pants, and the adjustable hinge system ensures your natural movement isn’t compromised. It’s lightweight, breathable, and built to last — exactly what you want from a knee brace you can trust every weekend.

Key Features:
• A.C.M. carbon fiber epoxy matrix frame – rigid, lightweight, and anatomically correct
• Asymmetri-Glide hinge follows natural knee motion and self-aligns tibia
• Adjustable extension regulator (0°–30°) for personalized control
• A.R.C. cuff provides strong lateral support and secure retention
• Patented Anti-Rotation Tether links to boots to prevent twisting injuries
• Tele-Tri patella cup with EV50 foam and collapsible design for tighter gear fit
• Standard adjustable strapping system for easy, secure setup
• Water-resistant construction – non-corrosive metals and washable materials
• Field-repairable with factory replacement parts (U.S. support)
• Includes cotton compression undersleeves and tethers
• Sold as a pair (left and right)