BlueSkyBlue Delta Ultimate Flying Suit The BlueSkyBlue Delta Ultimate Flying Suit is a 4 layer garment designed for great for use in cold weather and s perfect for use in open cockpit microlights. Typically, this suit is perfect for use in open-cockpit microlights at altitudes of up to 10,000 feet. Many high-altitude paraglider pilots and other leisure aviation pilots also find this top of the range suit to be ideal. LAYERS: 1) The outer fabric is called TASLON ® which is windproof and has a great soft feel for comfort. It is very durable and is coated in PU (polyurethane) to resist water. 2) The outer-middle layer is 100gsm POLYFILL QUILTING. This is a superior insulating material which is designed to retain your body’s heat as much as possible. 3) The inner-middle layer is 100gsm THINSULATE™ made by 3M. The unique microfibres of Thinsulate™ Insulation are about ten times smaller than the fibres of most other synthetic insulations, which means they’re much more efficient at trapping air. . . and more effective at keeping you warm. It also means more fibres can be packed into the same space, where they can reflect back more of the body’s radiant heat without being bulky. 4) The suit lining is black POLYESTER which is dyed using only azo-free materials in the production process. .