Double Up Pump Pak's allow you the convenience of carrying everything with you. The back part of the pak is a double zipper pak made to hold your pump, dual zipper gives you the freedom to open pak from either side. The front Pak is big enough to hold pump with the back pak for your small meter,test strips and poker. Great for having everything you need all together Double Up Pump Pak's are great when you want to make sure that you have a test kit with you at all times or if you just need a spare pouch for money, candy etc. Splash paks are water resistant, water will bead up on the pak. They are "not" water proof.