Bladder remains flat when zipped

hydraulic shock absorbing damper

But the truth is you do not want any getting in your oil in the first place

and the collar can accommodate a Leatt neck brace if worn

It dramatically reduces the unwanted phenomenon known as "Head-shake" that is commonly found on ALL off-road production motorcycles and especially predominant on road bikes

QuakeLED - Pro Wiring Harness Options:Universal Wiring Harness Pro Bladder remains flat when zippedHigh Quality Litght LED Toggle Switch Two Inline 30 Amp Fuse Two Inline 40 Amp Relay Waterproof Quick Connections Two Connection Legs Rated for 300W 3 Gauge High Power Wire