The FILBE compatible Ultimate Source WXP Low Profile Hydration System with XL filling handle is usable with most common hydration systems of competitors. Our Ultimate Source M.C. Hydration System is designed to fit US Marine Corps FILBE gear. This low profile blatter features all the Source Hydration advantages. Features: Compatible with the Helix Valve and the Storm Valve Helix Valve features a rounded shape that requires no mouth orientation for easy use; built-in "bio-net" style shut-off mechanism prevents spilling during transport Hi-Flow Storm-Valve: No-bite push-pull valve with integrated shut-off mechanism; easy disassembly for cleaning Angled Valve: Turns 360 degrees for perfect valve/mouth orientation; 25cm shorter tube and less excess tube bouncing around the chest Dirt shield valve cover to protect mouthpiece from dirt Cool Weave Cover Tube: Insulates and blocks UV-light;