The Atomic Redster S9 is a high-performance skating boot featuring race-inspired technology for precision and control. Lighten the load, feel the control and let the power flow – that’s the design thinking behind the Atomic Redster S9 boot. The Race Fit and Prolink Racing Split Sole SK makes your foot feel precise and light as a feather while the Low Cut inner boot construction is built just like a running shoe, shaving off even more weight. As for acceleration, Atomic's Carbon Power Base SK is made from one single piece of carbon with a dedicated skating flex so you can really feel that power transmission, while the Carbon Loaded Cuff stabilizes your ankle. The boot comes with Quicklace – stretch laces that are quick and easy to tighten even with gloves on, and a Sidas Insole so you can compete in comfort. The Prolink outsole means it works with all 2-rail bindings including NNN® and Turnamic®. Race Fit — A precise fit for competitive athletes. Prolink Racing Splite Sole SK — A minimalist racing split outsole, making the boot lighter with a closer connection to the binding. Prolink — Atomic's boots are compatible with all 2 rail binding systems like Prolink, NNN® and Turnamic®. Race Quicklace — A superlight racing version of Atomic's Quicklace system: easy to tighten with a great fit and hold. Carbon Loaded Cuff — Stabilizes the ankle and keeps your foot perfectly aligned on your ski. Carbon Power Base SK — A single piece of carbon: superb power transmission and stability with a dedicated skating flex. Lace Cover with Central Zip — Making it easy to get into the boot to close it. Low Cut — Constructed just like a running shoe - saving weight and ensuring maximum freedom of movement.