USF Bulls Pocket Golf Ball Cleaner. The NCAA USF Bulls Pocket Golf Ball Cleaner integrates portability with practicality. This boasts a unique, lightweight design that keeps the microfiber inner lining moist while the waterproof outer lining remains dry. Moisture and dirt are kept locked inside using a strong magnetic seal. The Pocket Ball Cleaner also comes with a removable domed ball marker. By Sun Time Links Walker.