●Flex Rating 6.5 (1 Soft - 10 Stiff) ●Stage 6 | Duraflex ST Simply put, Duraflex St is the same material as regular Duraflex, but with increased glass for more response without the weight. Designed for cold temperatures. ●Legacy | Duraflex ST Simply put, Duraflex St is the same material as regular Duraflex, but with increased glass for more response without the weight. Designed for cold temperatures. ●Grade 8.8 Hardware The strongest steel available on the market, Unions use of Grade 8.8 represents a commitment to delivering the strongest and most reliable bindings on the market today. ●Forma Lab Ankle Strap Lightweight, responsive, and trusted by Jess.