Knee sleeves are not the same as knee braces.
Knee sleeves provide some support to the knee but do not hinder its natural range of motion or immobilize the joint in any way. This makes knee sleeves unsuitable for providing support after a knee injury or surgery, but rather they are designed to protect the knee from future injury or risk of further damage to an injured area. This protection is particularly important for athletes that put their knees under pressure every day in activities like running, jumping, or weightlifting.
Knee sleeves also add a valuable compression element which increases blood flow to the area and reduces pain both during and after a workout as well as any post- workout swelling. The neoprene material that knee sleeves are made of make knee sleeves an excellent option to wear post-injury as they provide some support but still allow the knee to strengthen naturally.