(2) 10oz/.3L Bottles Included Weight 6.5oz/184g Two snaps securely hold required race bibs/numbers in place. Center back zippered pocket for gel, cell phone etc External binding made of soft, durable stretch fabric to provide extreme flexibility while preventing skin irritation 3D AirMesh body panel for optimal breathability Bottle-lock bungee system keeps 10oz water bottles in place ? especially handy during transport Dual adjusting waist belt with quick-release buckle Strap Secure webbing control Reflective logo