Owen Here To Help! Have a little look below at both, my personal opinion as well as the in's and out's of what makes a sleeve right for you...
Flexis – The most flexible and have a lot of give in them. Still 7mm but made for comfort as well as performance. These sleeves are great if you want warmth at the knee and not to worry about any discomfort. I would be wearing these for accessory days or if I have a session where there isn’t much load. Somthing like a high bar, cleans, leg press and anything that requires a bit of freedom. Flexible by name, flexible by nature.
Stiff – Similar to the flexis but they have that little bit more pop and oommf. You get that little bit more pop in the sleeve and a bit more stiffness (hence the name). However you will still feel you have a lot of range of motion and you are able to bend your knee without any issue etc. These are comparable to our older version stiff cone sleeves or what you would class as a traditional knee sleeve if you have worn any other brands before. The beauty of the hourglass cut is that it helps provide more centre knee compression, while maintaining proper tightness around the calf and quad.
Rigor Mortis – These are a very different feel! Ultra dense and have really no movement when putting them on and squatting in the sleeves. Weight wise, they weigh almost double in corresponding sizes vs the Stiffs and Flexis.
If you have ever worn a knee wrap, they feel similar to this and are not for everyone. They are designed for performance and you may feel a compromise in comfort because of this, especially during longer sessions. But the payoff on your squat PRs is something else!