Helite Zip In 2 Airbag Vest - Rider Airbag Protection - Black - FREE AIR WAISTCOAT with every order. Worth £34.99FREE AIR WAISTCOAT with every order. Worth 34. 99. The Air Waistcoats are perfect for taking the impact from the HIT Air Vest. TECHNOLOGY Big protection volume: the big protection volume (between 14 and 28 L depending on the size of the airbag) prevents serious injuries. The unique shape of the airbag absorbs shocks and stabilizes the body from head to tailbone. Mechanical system: reliable, simple and robust system. Simply hook the lanyard of the