Springbak Athletic Speedsoles Mens Size 10-11

A very interesting product as I am a distance runner here at University of Hawaii @ Manoa. I feel quicker with the Springbak's in a sprint. But, towards the end of a long run I still feel fresh, and able to maintain a quick and efficient stride.

These soles do not increase your verticle, I tried them for a whole week, and on average there was absolutly no increase in my verticle jump. Im 5'11'' and can get my fingers over the rim, with these soles i could actually get a little less than that at first because there kindof slippery under the soles, which also caused extra stress on my joints.
They may improve running but i doubt it, its just extra weight. [...]

This item was off the heazey. I could only grab rim but with the springbaks I could dunk! It gives you about 4 inches instantly! I would recommend this item for big ballas.