Finding the Right Fit: 8 MTB Knee Pads, Tested

For most women, unisex sizing can be a real challenge. Items are often either too large or too small, too boxy or just don’t fit right. Unfortunately, knee pad sizing is no exception. Each brand’s size guide varies, and when you have curves, finding knee pads that fit properly—and stay put while riding—can be tough.

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We aimed to simplify this process by trying on both soft and hard-shell pads from various top brands. Simply sizing down for women often doesn’t work well when it comes to knee pads.

We received test items ranging from size small to XXL based on our measurements. I'll admit it was a bit shocking to wear a double XL in unisex sizing. However, the significant point is that all the pads somewhat fit.

Buying Tips for Unisex MTB Knee Pads

1. Measure yourself 10cm (4") above and below the knee and keep these measurements handy while shopping.
2. Always review the size chart as each brand's sizing can differ.
3. Consider your inseam, especially if you're shorter than 5'4"; knee pads may come up higher on your thigh and lower on your calf.
4. Knee pads should fit snugly to stay in place.
   1. Loose fits can result in fabric bunching and chafing.
   2. A little snugness is okay if it helps the pads stay put.

Size Recommendations by Brand

Here's a quick reference chart for knee pads from the brands we tested. Note these sizes are based off your thigh/above the knee measurements.

Tested Knee Pads

For reference, here are my measurements:

• Height: 5'5"
• Clothing size: Medium
• Inseam: 78cm (30.7")
• Diameter above the knee: 49cm (19.3")
• Diameter below the knee: 35cm (14")

My personal preference is gear that’s mostly invisible to allow unrestricted movement. Thus, I dislike tight fits, especially around my thighs—I loathe "sausage legs." Across all brands, pads that fit above the knee were often too loose below the knee.

Dakine Slayer Pro Knee Pad

• Price: $104.95
• Available at Backcountry or Compare Prices

• Size tested: Large
• Type: Pull up with strap
• Features:
  • Lightweight, low-profile CE-certified knee protector (EN-1621-1 Level 1)
  • Dual-density DK Impact energy-absorbing foam technology
  • Cordura® abrasion resistance
  • Polygiene® Odor Control technology
  • Seamless calf band and silicone gripper elastic keep pad in place
  • Pre-curved ergonomic patterning for enhanced fit

Fit and Feel

This serious and burly pad offers extensive coverage with foam padding and thicker, abrasion-resistant Cordura fabric on the sides. The back is covered with breathable narrow mesh fabric. The pads go on and off easily, and silicone grippers on both cuffs with an upper strap ensure a secure fit. These pads are roomy, and although the bottom cuff is too large, the strap keeps them in place. They’re comfortable on downhill rides but too bulky and warm for pedally sections. Excellent for trail and all-mountain rides.

Did it stay up? Yes.

Fit: Roomy around the knee, snug around the upper cuff.

Fox Enduro D3O Knee Guard

• Price: $84.95
• Available at Jenson USA or Compare Prices

• Size tested: Large
• Type: Pull up
• Features:
  • EN-1621-1 Level 1, including high and low-temperature conditions
  • CE certified, removable D3O® insert for world-leading impact protection
  • Moisture-wicking, open stretch mesh at back of knee for breathability
  • Cordura® fabric offers higher abrasion resistance in key impact areas
  • Reinforced skid plate reduces friction with the ground in a sliding fall

Fit and Feel

The D3O® inserts are small but offer substantial coverage. The lycra-like fabric and wide mesh back make these pads feel more like knee warmers. They are thin and breathable, providing great comfort, but the fabric appears not tear- or abrasion-resistant. They tend to slide down during rides, possibly due to no contouring, but offer all-day comfort and breathability.

Did it stay up? Mostly.

Fit: Good overall fit, but roomy at the back of the knee.

Ion K-Traze AMP Knee Pad

• Price: $109.95
• Available at Jenson USA or Compare Prices

• Size tested: Large
• Type: Zippered with a top strap
• Features:
  • Super_Perforator_Neoprene
  • Quick_E zipper
  • Light Impact Protection (EN-1621-1, Level 1)
  • Pre-shaped flexible yet hard-ish SAS-TEC pad, designed to harden up on impact

Fit and Feel

The K-Traze AMP knee pad uses a SAS-TEC pad with a thin plastic cover to harden on impact. Perforated neoprene and foam padding provide protection, while mesh fabric and a back-of-the-knee cutout allow airflow. Its unique zippered design allows easy on/off use without removing shoes. These knee pads are short and lack coverage above the knee, but wide silicone grippers and a top strap ensure they stay in place. Suitable for All-Mountain and Enduro rides with good airflow and comfort for pedaling.

Did it stay up? Yes.

Fit: Roomy around the knee, loose below. Relied on the strap to keep it in place.

Pearl Izumi Summit Knee Guard

• Price: $85.00
• Available at Pearl Izumi or Compare Prices

• Size tested: Small
• Type: Pull-on
• Features:
  • Lightweight pads for trail riding
  • D3O® viscoelastic sheet material backed with EVA foam provides CE level 1 protection with minimal bulk
  • Cordura® 4-way stretch woven fabric provides durability in high impact areas
  • Mesh fabric on the main sleeve offers breathability
  • Longer knee warmer inspired design with wide elastic grippers and silicone interior print keeps pads in place

Fit and Feel

Pearl Izumi Summit Knee Guard was a pleasant surprise. Designed with pedal comfort in mind, these pads offer a lot of fabric above and below the knee, ensuring good coverage and breathability. The knee guard itself is a D3O insert inside lightweight, four-way stretch Cordura® fabric. These pads stay put and reduce chafing due to an open, fabric-free back. Though snug, I might prefer a medium for a slightly looser fit.

Did it stay up? Yes.

Fit: Snug like knee warmers. If between sizes, go for the larger one.

POC VPD System Lite

• Price: $130
• Available at POC Sports or Compare Prices

• Size tested: Medium
• Type: Pull-on
• Features:
  • 3D-molded VPD protection
  • EN-1621-1, Level 1 certified shock absorption
  • Large ventilation channels for extreme ventilation
  • Mesh fabric on the interior optimizes moisture management
  • Sleeve constructed with reinforced fabric in the front panel for a precise and secure fit

Fit and Feel

POC's VPD System Lite pads are flexible yet harden on impact, offering excellent impact absorption for Enduro or aggressive trail riding. They are comfortable and breathable, but tend to slip down, requiring frequent re-adjustments. They are easy to wear and provide significant protection, but inclusion of a top strap may enhance their performance.

Did it stay up? No.

Learn more on our website: custom mountain bike knee pads.

Fit: Loose. Could have sized down.

SHRED. Flexi Knee Pads Lite

• Price: $84.95
• Available at Performance Bike or Compare Prices

• Size tested: Large
• Type: Pull-on
• Features:
  • SLYTECH™ shock absorption foam adapts to different forces and impact speeds
  • SLYTECH™ Flexi Foam molded with a hexagon structure for flexibility and impact absorption
  • ARMORTEX® fabric for durability and protection from abrasions and punctures
  • Super Stretch Spandex fabric with Armortex® front panel
  • Meets EN-1621-1 Level 1, K Type A protection levels
  • Spandex fabric

Fit and Feel

These pads felt extremely lightweight and thin out of the bag. They feature a SLYTECH™ Flexi Foam cup that hardens on impact. Surrounded by thin spandex and mesh fabric, the pads are airy and breathable, but the overall fit is too loose and doesn't stay up. The fabric might not withstand much abrasion over time.

Did they stay up? No.

Fit: Too loose.

SHRED. Flexi Knee Pads Enduro

• Price: $99.95
• Available at Performance Bike or Compare Prices

• Size tested: Large
• Type: Pull-on with strap
• Features:
  • SLYTECH™ shock absorption foam adapts to different forces and impact speeds
  • SLYTECH™ Foam molded with a hexagon structure for flexibility and impact absorption
  • ARMORTEX® fabric for durability and protection from abrasions and punctures
  • Meets EN-1621-1 Level 1, K Type A standards
  • Material: SLYTECH™ Foam, Armortex®, Neoprene, Velcro strap

Beefier than the Lite version, the Enduro pads provide added protection for aggressive riding. These pads use the same SLYTECH foam cup with additional padding below the knee cap and sides. Thicker neoprene material adds abrasion resistance and the Velcro strap helps to keep the pads in place. They’re sturdy yet comfortable, suitable for more intense rides.

Did they stay up? Yes.

Fit: Form-fitting with a good strap on top to adjust size.

Troy Lee Designs Stage Knee Guards

• Size tested: XL/XXL
• Type: Pull-on
• Features:
  • D3O® lightweight, low profile elbow impact protection
  • Silicone grippers prevent slipping
  • Spacer-prene sleeve with breathable mesh panel for all-day comfort
  • Durable, abrasion-resistant elbow panel
  • Sold in pairs (left/right)
  • CE EN-1621-1 Certified

Fit and Feel

The longest sleeves in this test, these guards reach well up the thigh and down to the mid-lower calf. They slip on easily and provide good ventilation with thin, mesh fabric. The D3O® inserts offer flexible, hardening protection on impact. However, the sizing is very snug, so you may need to size up, especially if you have muscular thighs. Despite this, they provide comfort and stay in place due to their long sleeves.

Did they stay up? Yes.

Fit: Snug and quite long, not ideal for shorter riders.

My Top Picks

For trail riders who like to keep their pads on all day, the Pearl Izumi Summit Knee Guards are my top choice. For aggressive trail or enduro riding, I recommend the POC VPD System Lite if you get the sizing right. Otherwise, the SHRED. Flexi Enduro pads are a solid second choice.

When was the last time you hit the trails without knee pads? For most riders, knee pads are a must-have. We tested 14 lightweight knee pads to identify the best balance of comfort and protection.

Knee pads are essential alongside helmets. The market offers a wide range from slim, lightweight models to heavy-duty protectors. Most riders need a lightweight, comfortable pad for everyday trails, but high protection levels are crucial.

We tested 14 lightweight knee pads in labs and on trails worldwide. All models feature polyurethane or viscoelastic foam protectors, known for better protection and efficient impact absorption compared to hard-shell models. These materials ensure comfort and can take multiple hits, returning to their original shape after impact.

What Matters in Knee Pads

Top knee pads combine protection, ventilation, and comfort. Manufacturing quality and aesthetics also matter.

Is Beefier Always Better? Protection First!

All knee pads in this test meet the EN-1621-1 standard for motorcycle limb protection, offering high protection levels. Differences arise in protection levels and how well the pads fit and stay in place during crashes. Pads need to cover the knee adequately and stay put to offer optimal protection.

Comfort is Key

Comfort is crucial, especially for long rides. Even minor discomfort can turn a great ride into a suffer-fest. Proper fit is necessary to avoid constant adjustment and ensure pads stay secure.

Only Well-Fitting Pads Protect Properly

A good fit is essential for protection. Pads that constantly slip do not protect effectively. Different attachment methods (slip-on, Velcro) and silicone strips help ensure a secure fit.

Ventilation on Hot Days

Ventilation depends on material type and sleeve design. Open designs or thin mesh can provide better airflow. Many knee pads have vent holes in the protector pad for added breathability.

Manufacturing Quality and Looks Matter

Aesthetics and practical aspects like packability and washing instructions also matter. Removable or sewn-in protectors affect ease of cleaning. Hand washing is often recommended to avoid damaging the protector.

How We Tested

Tests involved both laboratory analysis and real-world riding. Lab tests measured shock absorption, while trail tests assessed comfort, fit, ventilation, and aesthetics.

Laboratory Tests Following Standard Procedures

In partnership with SAS-TEC, we conducted simplified CE tests to confirm all pads meet EN-1621-1 standards. Using a 5 kg weight dropped from one meter, we measured the residual force and force curve at multiple points. All pads reduced force by at least 80%.

The “Flatten the Curve” Knee Pad Edition

Two force curve examples: A good curve shows a gradual increase, indicating the protector absorbs forces gently. Poor curves steepen suddenly, resulting in abrupt force application. Optimal protectors moderate force increase for more tolerable impact.

Practical Trails Tests

Editors tested pads on various rides, providing a comprehensive assessment of comfort, fit, and ventilation. Different anatomical proportions and riding scenarios offered insights into which protectors are ENDURO-approved.

The Test Field

Our test included 14 popular knee pads, differing in comfort, weight, style, and protection. Lab tests provided residual force metrics and time from impact. Pads with lower maximum residual force and longer delay offer better protection.

Top Performers

Best in Test: Rapha Trail Knee Pad - Excellent fit, comfort, and protection.

Best Buy: 100% Teratec Plus - Secure fit and comfort for pedaling.

Conclusion

All models offer good protection and use soft protectors for comfort and shock absorption. However, ventilation and fit vary significantly. The best knee pads are the ones you