I am a cyclist from way back and can easily reel off 10km on the exercise bike inside half an hour, despite being in my eighties. However recently due to a very enlarged prostate i have suffered complications eg bleeding etc if I cycle hard and/or fast. I installed the Daway Gel Seat Cover and my problems appear to be a thing of the past. Also my son who is an exercise physiologist said he had had positive results with this product on bikes for Spin classes. Well done, Daway.