Take your squats to the next level with ONI PRO Stiff Knee Sleeves—designed for serious powerlifters who need maximum support, stiffness, and durability. These knee sleeves provide strong rebound, helping you push out of the bottom of a squat with more power.
Compared to Inzer ErgoPro stiff knee sleeves, these have a cone shape ensuring a tight fit are more durable and just as stiff. Whether you’re training or competing, these IPF-approved knee sleeves offer the stability you need to lift with confidence.
Built with input from Japanese powerlifting champion Wataru Kobayakawa, these sleeves have a reinforced lateral support system that keeps your knees stable, especially if you squat with a medium or wide stance. Plus, the design ensures efficient power transfer, so you get the most out of every lift.
Super Stiff for Maximum Support – Keeps your knees secure and provides strong rebound when squatting.
Reinforced for Extra Stability – Two stitched support lines prevent knee movement and help keep your form tight.
Durable Cone-Shaped Design – For a tight fit around the knee
Optimized for Powerlifting – Designed by top lifters for maximum strength and performance.
IPF Approved for Competition – Meet the rules for powerlifting competitions worldwide.
Men’s Sizing Guide
S: Up to 66kg weight class
M: 66kg-83kg weight class
L: 83kg-105kg weight class
XL: 105kg and above
Women’s Sizing Guide
S: Up to 57kg weight class
M: 57kg-69kg weight class
L: 69kg-84kg weight class
XL: 84kg and above
Sizing Comparison (vs. Inzer Ergo Pro & Hansu Power & SBD Knee sleeves)
If you wear a tight fit in these brands: Size 1 up (e.g., M = ONI PRO L)
If you wear a loose fit in these brands: Choose the same size
Material: 7mm high-quality neoprene
Front Height: 28.5cm
Back Height: 27.0cm
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