Compression helps to increase bloodflow to the area. This helps keep the joint warm, reducing knee pain caused by tendonitis type injuries' as well as other joint issues like arthritis.
Added support helps with stability in the knee joint. This is great for movements like squats, helping to reduce pain and discomfort in the bottom position.
The 7mm neoprene materials helps give a recoil effect. This is great for getting out of the hole in big lifts like the squat, clean or snatch. 7mm kneesleeves have been shown to improve one-rep max lifts by upto as much as 10% in experienced athletes.