Comp Stiff Knee Sleeves - 9mm [Size XS]

Harris 9mm COMP Stiff Knee Sleeves

The Original 9mm Knee Sleeve. Built for Maximum Support.

Originally developed alongside some of the world's strongest powerlifters and strongman athletes, the Harris 9mm COMP Stiff Knee Sleeves set the benchmark for maximum-support knee sleeves. Designed for athletes who demand the highest levels of compression, stability, and durability, these sleeves continue to be the choice of serious strength competitors around the world.

Featuring a massive 9mm thickness and constructed using premium SCR neoprene, these sleeves deliver exceptional support during heavy squats, strongman events, and lower-body strength training. The increased neoprene thickness creates a highly supportive fit designed to improve stability and confidence under maximal loads.

Unlike lower-quality sleeves manufactured from cheaper SBR neoprene, Harris 9mm COMP Stiff Knee Sleeves utilise premium SCR neoprene for superior durability, comfort, resilience, and long-term performance.

Built with a highly durable outer layer and reinforced stitching throughout, these sleeves have been designed to withstand the demands of serious training and competition while maintaining their support and structure over time.

For athletes seeking maximum compression and support from a traditional knee sleeve design, the Harris 9mm COMP Stiff Knee Sleeves remain one of the most proven options available.

To learn more about sleeve thickness and performance differences, see: 7mm Vs 9mm Knee Sleeves.

For a complete guide to selecting knee sleeves, visit: Knee Sleeves Australia: The Complete Guide for Athletes and Fitness Enthusiasts.

Key Features

• Premium SCR neoprene construction.

• Massive 9mm thickness.

• Competition-focused support and compression.

• Highly durable outer layer.

• Reinforced stitching throughout.

• Designed for maximum stability under heavy loads.

• Suitable for powerlifting, strongman, and strength training.

• Classic Harris colourway.

• Sold as a pair.

• Patent pending design.

Specifications

• Material: Premium SCR Neoprene.

• Thickness: 9mm.

• Construction: Competition Stiff Design.

• Reinforced Stitching.

• Sold as a Pair.

Size Guide

NOTE:

Measure around kneecap, if calf is bigger than knee joint make sure the size you choose has a maximum size equal to or bigger than your calf otherwise you wont get the sleeve on. If you have large lower quads you may need to size up to accommodate.

How to Measure

Step 1 - Stand with your leg straight and muscles relaxed.

Step 2 - Measure around the centre of the kneecap.

Step 3 - Compare your measurement to the size chart above.

Step 4 - If your calf measurement is larger than your knee measurement, ensure the maximum size for your chosen sleeve accommodates your calf.

Sizing Notes

• Measure around the kneecap with the leg relaxed.

• If your calf is larger than your knee measurement, use your calf measurement when selecting a size.

• Ensure the maximum measurement of your chosen size is equal to or greater than your calf circumference.

• Proper sizing is essential for both performance and comfort.

Important Usage Notes

• Designed for serious strength athletes and heavy lower-body training.

• Provides high levels of compression and support.

• The 9mm construction will fit significantly tighter than traditional 7mm sleeves.

• Ensure sleeves are fitted correctly before training.

• Avoid excessive stretching when fitting or removing the sleeves.

• Inspect sleeves regularly for signs of wear or damage.

• Always use proper lifting technique and safety practices.

Care Instructions

Step 1 - Hand wash using mild detergent.

Step 2 - Rinse thoroughly with clean water.

Step 3 - Air dry completely before storage.

Step 4 - Do not machine dry.

Step 5 - Avoid excessive heat, bleach, ironing, or dry cleaning.

Frequently Asked Questions

Q: What is the benefit of a 9mm knee sleeve?

A: A 9mm sleeve provides greater compression, support, and stability than a traditional 7mm sleeve, making it popular with competitive powerlifters and strength athletes.

Q: Why is SCR neoprene better than SBR neoprene?

A: SCR neoprene generally offers superior durability, flexibility, resilience, and comfort compared to lower-grade SBR neoprene.

Q: Who are these sleeves designed for?

A: The Harris 9mm COMP Stiff Knee Sleeves are designed for powerlifters, strongman athletes, and serious strength competitors seeking maximum knee support.

Q: How should these sleeves fit?

A: They should feel tight and supportive without causing pain, numbness, or restricting circulation.

Q: What if my calves are larger than my knee measurement?

A: Ensure the maximum size of your chosen sleeve is equal to or greater than your calf measurement so the sleeve can be fitted correctly.

Q: Are these suitable for competition?

A: Many competitive strength athletes use 9mm knee sleeves. Always check your federation's current equipment rules before competing.

Q: Are the sleeves sold individually?

A: No. Harris 9mm COMP Stiff Knee Sleeves are sold as a pair.

Maximum Support. Maximum Stability. Go Heavy with Harris Stability Systems.

Thoughts

By: David Fevez

Bought 3 pairs of them one for me and for 2 of my powerlifting students the only complaint is they can be bunchy or bulky behind the knee

(4)

Just insane

By: Marcus Reid

You know when you throw these on it’s a serious day. Perfect for peak week lifts, and they’ve held up through hell and back.

(5)

They mean business

By: Georgia Blake

No softness, just straight-up structure and stiffness. Not comfy at first but that’s not the point.

(5)

Training essential

By: Josh Palmer

Haven’t done a single leg session without them since they arrived. Zero knee pain.

(5)

Love the old-school colours

By: Hannah Quinn

Classic Harris vibe. Understated but looks pro.

(5)

No roll, no bunch

By: Liam Hayes

Full sets of squats, lunges, box steps, these stay locked in place.

(5)

These do NOT bend

By: Ava

In the best way. They're stiff and tough and exactly what I wanted for comp prep.

(5)

My knees feel bulletproof

By: Daniel Harris

I’ve been dealing with knee strain for years and honestly these sleeves make me feel like I can go all-out again. Rock solid support and warmth. Probably added 10kg to my confidence.

(5)

A little brutal to get off

By: Brooke Lyons

They feel amazing when lifting, but good luck getting them off without a fight

(5)

Serious sleeves

By: Jake Patterson

You won’t “slip these on” quickly. But once they’re on, you’re good to go to war.

(5)