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EXCLUSIVE PATENTED TECHNOLOGY
Featuring NEENCA's exclusive patented design with an anatomically contoured Patella Gel Pad that surrounds the kneecap and dual Spring Stabilizers positioned on both sides of the joint. This advanced support system delivers targeted compression and enhanced lateral stability while helping distribute pressure more evenly across the knee. Engineered to provide reliable support, lasting comfort, and confidence during everyday activities, work, training, and sports.
UPGRADED NON-SLIP DESIGN
Designed to stay securely in place through every movement. Unlike ordinary knee sleeves, the ACE-51 combines patented stabilizers, a Patella Gel Pad, anti-slip silicone strips, and high-elastic compression fabric to minimize slipping or rolling during daily activities or intense workouts. The breathable, skin-friendly materials provide a secure fit with exceptional comfort for extended wear.
ADVANCED 3D COMPRESSION KNITTING
Built with precision 3D knitting technology and an ergonomic anatomical design, the ACE-51 delivers 360° targeted compression that naturally conforms to the shape of your knee. The premium compression fabric provides a secure fit while helping reduce pressure during movement, enhancing stability without restricting flexibility.
ALL-DAY BREATHABLE COMFORT
Crafted with NEENCA's premium Air Knit fabric, the ACE-51 quickly wicks away moisture while maximizing airflow for continuous breathability. Lightweight, fast-drying, and engineered with optimized thickness, it delivers enhanced support without compromising comfort. Whether you're working, exercising, traveling, or staying active throughout the day, you'll enjoy dependable comfort from morning to night.
PROFESSIONAL SUPPORT FOR ACTIVE LIFESTYLES
Designed for individuals seeking enhanced knee stability, targeted compression, and dependable everyday support during sports, fitness, work, and daily activities. The ACE-51 is an excellent choice for people experiencing knee fatigue or seeking additional support associated with common knee concerns such as arthritis, meniscus conditions, ACL-related instability, overuse, or high-impact activities.
Ideal for weightlifting, basketball, running, CrossFit, hiking, walking, tennis, cycling, fitness training, and everyday wear.
Available in multiple sizes for both men and women. Please refer to the size chart to ensure your ideal fit.
Specifications
NOTE: Above data reflects our Standard ACE-51. For users with sensitive skin, our ACE-50 is specifically designed with 100% LATEX-FREE materials.
Size & Fit
Measure Before You Order
Choosing the correct size is the most important step to getting the comfort, support, and stability your NEENCA brace is designed to provide.
A brace that is too loose may slide or shift during movement. A brace that is too tight may pinch, feel uncomfortable, or be difficult to wear for longer periods.
Please measure before ordering. Do not choose your size based only on your height, weight, or usual clothing size.
How to Measure Your Knee Brace Size
Use a soft, flexible measuring tape. For the most accurate result, measure directly on your skin or over thin clothing.
- Stand in a relaxed position with your leg straight, but not locked.
- Find the center of your kneecap.
- Measure around your thigh approximately 5.5 inches / 14 cm above the center of your kneecap.
- Keep the tape flat against your leg. Do not pull it too tight.
- Write down your measurement and match it to the size chart before ordering.
Important: Your thigh measurement is the main sizing reference. Your regular pants size, body weight, or height may not match the correct brace size.

How Your Brace Should Feel
Your NEENCA brace should feel secure, supportive, and comfortably snug. It should stay in place during normal movement without sliding down or rolling.
- Secure around the leg
- Supportive during walking, work, exercise, or daily activities
- Snug without causing pain
- Comfortable enough for your intended use
If You Are Between Sizes
If your measurement falls between two sizes, choose based on the fit you prefer.
Choose the smaller size if you prefer:
- Firmer compression
- A more secure fit
- Support during sports or higher activity levels
Choose the larger size if you prefer:
- A more relaxed fit
- All-day comfort
- Easier application and removal
Signs the Size May Not Be Right
You may need a different size if you notice:
- The brace slides down during activity
- The brace rolls, bunches, or shifts
- Pinching behind the knee
- Persistent numbness or tingling
- Deep pressure marks that do not fade shortly after removal
Need Help Choosing a Size?
If you are unsure which size to choose, our customer support team can help before you place your order.
To help us recommend the right size, please include:
- Your thigh measurement taken 5.5 inches / 14 cm above the kneecap
- The product you are interested in
- Whether you prefer a firmer or more relaxed fit
You can reach us through our Contact Us page.
Frequently Asked Questions
Should I choose my normal clothing size?
No. Knee brace sizing should be based on your thigh circumference, not your normal pants size or clothing size.
Should I measure while standing or sitting?
Standing is usually best. Keep your leg relaxed and straight, but do not lock your knee or tighten your thigh muscles while measuring.
How tight should the measuring tape be?
The tape should lie flat around your thigh without digging into your skin. Do not pull it tight. If the tape leaves a mark, you are pulling too firmly.
What if I am between two sizes?
Choose the smaller size for firmer compression and a more secure fit. Choose the larger size for a more relaxed fit and easier all-day wear.
Can I size down for stronger compression?
If you are between two sizes, sizing down may be appropriate if you prefer a firmer feel. Do not choose a size far below your measurement, as this may cause discomfort.
What should I do if the brace slides down?
If the brace slides down during movement, it may be too large, not positioned correctly, or not adjusted properly. Recheck your measurement and compare it with the size chart.
What should I do if the brace feels too tight?
A compression brace should feel snug and supportive, but it should not cause pain, persistent numbness, tingling, or restricted circulation. If it feels too tight, remove it and consider a larger size.
Can I wear the brace all day?
Many customers wear NEENCA braces during daily activities, work, walking, training, or sports. Wear time depends on your comfort level and activity. If you feel discomfort, remove the brace and take a break.
Product Care
- Hand wash recommended using cold or lukewarm water
- Use mild detergent only; avoid bleach and fabric softeners
- Do not machine wash, tumble dry, or ironGently squeeze out excess water; do not wring
- Air dry naturally in a cool, well-ventilated placeAvoid direct sunlight or high heat to prevent deformation
- Store in a dry place when not in use
Proper care helps maintain elasticity, support, and long-term performance.
Free Shipping & Returns
Free Shipping on Orders Over $60 and Free Returns Accepted Within 30 Days. Visit Our Return Policy
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Who Is the ACE-51 For?
Everyday Walking & Standing
Added support for walking, climbing stairs, running errands, working, and other daily activities.
Joint Stiffness & Everyday Discomfort
Supportive compression for people managing stiffness associated with arthritis or general knee discomfort during movement.
Recovery Routines
A flexible support option while awaiting treatment or during later-stage recovery, when compression support has been approved by your healthcare professional.
Training & Recreational Sports
Designed to move naturally during gym workouts, wrestling, hiking, running, pickleball, basketball, and other activities.

Why Professionals Choose the ACE-51?
— Patented Stability Support
Features an anatomically contoured patella gel pad and ergonomic double-sided spring stabilizers to secure the knee joint and reinforce lateral support.
— Upgraded Anti-Slip Design
Engineered with dual wave anti-allergy silicone strips and reinforced inside elastic webbing to guarantee the sleeve stays firmly in place without rolling or sliding.
— 3D Advanced Knit Tech
Utilizes premium horizontal knit technology and highly breathable air-knit fabric to deliver rapid sweat evaporation, flexible movement, and all-day dry comfort.
— Targeted Compression Recovery
Applies even, targeted compression to reduce everyday joint fatigue, ease stiffness, and support faster active recovery after intense gym workouts or long hours of standing.
— 24/7 Lightweight Comfort
Slim, lightweight, and versatile enough to be worn under everyday clothes or during sleep, providing premium joint protection for basketball, running, weightlifting, and daily active wear.
Frequently Asked Questions
Each package includes two ACE-51 knee brace. It can be worn on either the left or right knee.
The ACE-51 provides Balanced support. It offers more structure than a basic compression sleeve while remaining lighter and more flexible than a rigid hinged brace.
The ACE-51 is a flexible compression sleeve with patella cushioning and side stabilizers. A rigid hinged brace provides stronger structural restraint but is heavier and less flexible. Follow your healthcare professional’s recommendation when choosing a brace for a diagnosed injury or after surgery.
The ACE-51 provides supportive compression and cushioning for everyday movement. It does not treat arthritis. Consult a healthcare professional if you are unsure whether compression support is appropriate for your condition.
Some customers use compression support while awaiting treatment or during later-stage recovery. The ACE-51 is not a post-operative immobilizer or range-of-motion brace. Use it after surgery only when approved by your healthcare professional.
Measure your thigh circumference 5.5 inches (14 cm) above the center of your kneecap and compare the measurement with the size chart. Do not select a size based only on height, weight, or usual clothing size.
Choose the smaller size for firmer compression or the larger size for a more relaxed fit. The brace should feel secure without causing numbness, tingling, pinching, or restricted circulation
The ACE-51 uses flexible side stabilizers rather than rigid metal hinges.
Yes. The ACE-51 contains natural rubber latex. Customers with a known latex allergy are highly recommended to choose our latex-free ACE-50 knee brace. For further assistance or sizing recommendations, please contact us at service@neenca.com before purchasing.
Wear time depends on your activity, comfort, fit, and individual needs. Begin with shorter periods and check your skin and comfort regularly. Remove the brace if you experience numbness, increased discomfort, unusual swelling, or skin irritation.
- Hand wash recommended using cold or luke warm water
- Use mild detergent only; avoid bleach and fabric softeners
- Do not machine wash, tumble dry, or iron Gently squeeze out excess water; do not wring
- Air dry naturally in a cool, well-ventilated place Avoid direct sunlight or high heat to prevent deformation
- Store in a dry place when not in use
Proper care helps maintain elasticity, support, and long-term performance.
We offer free returns within 30 days of purchase. Items must be unused and in original packaging. If you need to initiate a return or exchange, please contact our customer service team at service@neenca.com.
Disclaimer: This product is not a substitute for professional medical advice, diagnosis, or treatment. It is designed to provide support and stability for active lifestyles.
Free Shipping
On orders over $60
Customer Service
Email service@neenca.com with any questions.
Secure Payments
We accept PayPal /credit cards





