As I know that gas permeable contacts are made of special materials which allow oxygen enter your eyes and let your eyes breath. GP contacts provide superior optic and you do not need to refocus while blinking, because they are firm. However, the soft contacts will distort when you are blink,which can be annoying if you're reading, or detrimental to your performance if you're driving or participating in sports. However, GP contacts require a short adaption period, soft lenses are comfortable from just about the moment you put them on. So you can take advantage of GP contacts. GP contacts are comfortable, more durable, easier and less expensive to care for, healthier, and provide crisper vision.Hope this helpful.