Lightweight water-resistant nylon.  Just the right size for picnics in the park.  RFID protected interior credit card panel with quick access pockets.  Grommeted opening for charging cords and headphones.  Removable RFID wristlet with 3 credit card holders and fits most cellphones.  Quick access phone pocket.  Adjustable straps.  9.5" x 13" x 4"