If anybody understands what runners need it39s scott jurek so you can be assured that the jurek fkt vest has everything to see you through training and competition with a space for a hydration bladder and routing for the hose to come under or over your arm on either side to suit as well as two on board 600ml bottles you won39t need to worry about hydration keep fuel supplies close at hand in the zipped side pockets and easy access pockets on the straps the bungee system and adjustabl