Read the following article and answer the question.

Note you ca n't take an umbrella into the stadium , so as usual , I sought relief from the guys selling beer out of tubs of ice ; I put the ice down my shirt to cool myself off . I also had sunblock as well , a staple on a hot day . People do n't realize you have to reapply , and it 's a common mistake .

Why did the narrator want to bring an umbrella into the stadium ?
To shield themselves from the sun .