I think you should have 2 basketballs, one for indoors and the other one for outdoors. For indoors, spaldings wnba basketballs are a bit expensive but is good for use. Outdoors, im not sure if they have it for size 28.5, but spaldings street is really good. I have used it over summer everyday outdoor and it is still in a real good condition (also they are NOT expensive). FYI it is more likely that your basketball will be flattened quickly if you dribble on your way to the court or if you sit on it often. I dont recommend nikes basketball because I feel like they are heavier than spaldings.