Made from performance Rubber for Durability. Deep Channel Design provides Excellent Grip. The Ball is Waterproof and All Weather Condition. Excellent Ball for Outdoor Play. Basic playable conditions for B/B Dribble S-7 are as follows: 1) Ball to inflated with moisten/lubricated inflatable needle. 2) Air pressure in the ball to be filled should be between 7-9 PSI 3) Play ground should be cemented free of pebbles or other sharp object. 4) Ball should not be kept idle in the sun for long duration.