Gemini XTL is one of the latest variants of our high performance fabric, PBI Matrix. Brochure Where to Buy WHY CHOOSE GEMINI XTL? Gemini XTL is a variant of Matrix developed by Tencate. The fabric combines high abrasion resistance and tensile strength with PBI's proven protection from heat and flame. Gemini XTL is lightweight, flexible and breathable, ensuring high levels of comfort.