ZAMST JK-2
Reduce the strain on below the knee for jumpers
A solution for problems with the knee during jumping sports. A unique-shaped jumper's pad reduces the strain on the knee during jumping.
Product Description

Precisely compress below the kneecap
Accurate compression with a unique dual-stage jumper's pad reduces the strain on below the knee. Compression level can be easily adjusted with the under-strap.

Comfortable fit
Stretchable double raschel knit fabric with breathability and proper compression provides comfortable fit and support. It enables to bend and stretch the knee smoothly.

Reduce the strain around the kneecap
A semi-circular shaped patellar pad and the thigh belt gently and precisely support the kneecap to reduce the strain.
Size Chart
Measure the circumference of the thigh 16 cm above the center of the kneecap. If your measurement falls between two sizes, choose the larger one.

Size
S
M
L
LL
3L
Circumference of the thigh for JP/Asia model
40 - 43 cm
43 - 46 cm
46 - 49 cm
49 - 52 cm
52 - 55 cm
Circumference of the thigh for US/EU model
43 - 46 cm
(17.0 - 18.0 inches)
46 - 49 cm
(18.0 - 19.25 inches)
49 - 52 cm
(19.25 - 20.5 inches)
52 - 55 cm
(20.5 - 21.75 inches)
55 - 58 cm
(21.75 - 23.0 inches)
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Instruction
Recommended Products
FAQ for this product
Zamst products are designed for sports activities, so you may find that it is not as difficult to move as you might worry. In practice, you should be able to move comfortably.
Most braces are machine washable. After washing, hang them to dry in the shade. Please avoid washing with light-colored items, as colors may fade or transfer to other fabrics. When washing with other clothes, use a laundry net to prevent fraying or streaking. *Hand washing is recommended for some products. Please refer to the instruction manual for specific details (instruction manuals are also available on each product page of the Zamst website).
The Zamst Knee brace is designed for sports use, providing strong compression to apply firm pressure. If you do not require high compression, we recommend choosing one size larger.
First, ensure you have the correct size and follow the instructions in the manual for proper application. Be cautious not to tighten it too much, as excessive tightness can lead to congestion
Zamst Knee brace is designed to be worn directly on bare skin and is not recommended to be worn over tights. If worn over tights, depending on the material of the tights, the brace may slip off and the desired effect may not be achieved, or the increased thickness of the back of the knee may cause discomfort or pain when bending the knee.
If the size is borderline, we recommend the larger size.
From Dr. Evan Not necessarily. One of the biggest mistakes I see is athletes assuming they're fully recovered just because the pain has gone away. Pain is only one piece of the puzzle. Before I recommend discontinuing a brace, I want to see good strength, balance, confidence, and sport-specific movement. Can you jump, cut, sprint, and land without hesitation? That's what matters. Many athletes feel fine before their body is truly ready for the demands of competition. In most cases, I recommend gradually reducing brace use rather than stopping all at once. The goal is to make sure you're not only pain-free but also physically prepared to handle your sport safely.
From Dr. Evan I usually explain it this way: a knee sleeve is primarily about compression and comfort, while a knee brace is designed to provide more support and stability. Many athletes wear sleeves because they like the warmth, compression, and increased awareness they provide. A brace is generally the better option when there is a history of injury, instability, or a specific condition requiring additional support. As a physical therapist, I help athletes match the tool to the problem. If you're simply looking for mild support and comfort, a sleeve may be enough. If you're trying to manage instability or return from injury, a brace may be more appropriate.
From Dr. Evan As a sports physical therapist, I don't believe everyone needs a brace. But there are situations where a brace can be a smart tool. If you had just had an acute injury such as an ankle sprain or knee sprain a brace is a great tool during the protection phase to reduce the risk of further injury and provide stability and comfort. In my clinic, I often see athletes wait until they've been injured multiple times before thinking about prevention. A brace can provide an extra layer of protection during high-risk activities while you're continuing to build strength, balance, and movement control. The goal isn't to rely on the brace—it's to use it strategically to help keep you healthy and performing at your best.
Evan Jeffries, PT, DPT, MS
EVAN JEFFRIES is a physical therapist with a Doctorate in Physical Therapy (DPT) from the University of St. Augustine for Health Sciences. He has vast knowledge of the musculoskeletal system and has treated many orthopedic conditions by bringing a proactive approach to healthcare and lifestyle.















