Knee Sleeve Guide

Knee sleeves: how to choose the right thickness

When it comes to staying active, healthy and stable knees are everything. Whether you're chasing a new squat PR, grinding through a Hyrox race or logging long miles on the road, the right knee sleeve gives you the compression, warmth and support to train with confidence. At Rehband, we've been developing knee sleeves for athletes for decades – and we know one sleeve doesn't fit every sport. This guide explains the differences between our 3mm, 5mm and 7mm knee sleeves, so you can find the one that matches the way you train.

"There are three different thicknesses of knee support, all designed for different usage areas. The 3mm knee sleeve provides ideal support for high-agility or endurance workouts. The 5mm benefits the athlete in varied training where both agility and support are required. The 7mm offers powerful stabilization for heavy lifting."

says Johan Bohlin, physiotherapist and former Head of Development at Rehband.

What does a knee sleeve actually do?

A knee sleeve wraps the joint in compressive neoprene. That does three things: it increases blood flow and keeps the joint warm, it improves proprioception – your sense of where your knee is and how it moves – and it provides mechanical support under load. The result: your knees feel more stable, you move with more control, and you can train harder for longer. Unlike knee pads, sleeves have no padding; unlike rigid braces, they don't restrict your natural range of motion.

3mm knee sleeves – built for speed and endurance

The thinner the sleeve, the more freedom of movement. Our 3mm knee sleeves are made for sports with constant, dynamic motion: running, cycling, Hyrox and endurance-focused workouts. You get light compression and warmth without ever feeling restricted – ideal when your knees flex thousands of times per session.

Best for: running, Hyrox, cycling, endurance training
→ Shop 3mm knee sleeves

5mm knee sleeves – the all-rounder

The 5mm sleeve is our most popular thickness – and for good reason. It hits the sweet spot between mobility and support, making it the go-to choice for functional fitness and CrossFit, where a single workout can jump from box jumps to heavy thrusters. If you train varied and want one sleeve that does it all, start here.

Best for: CrossFit, functional fitness, HIIT, mixed training
→ Shop 5mm knee sleeves

7mm knee sleeves – maximum support for heavy lifting

When the barbell gets heavy, the 7mm sleeve delivers. The thicker neoprene provides powerful stabilization and a noticeable rebound out of the bottom of a squat – which is why it's the standard among powerlifters, weightlifters and athletes doing heavy CrossFit. Ideal for training built around static, high-load movements.

Best for: powerlifting, weightlifting, heavy CrossFit, bodybuilding
→ Shop 7mm knee sleeves

 

Compare our knee sleeves