The Atomic Redster TR F4 is an intentionally
constructed race boot, with a strong 130 flex and thick, supple shell material,
ideal for bigger athletes who find the 150-flex boot a touch too stiff. This
boot uses our most stable and temperature resistant Formula Pastics. It’s still
got the DNA of a World Cup race boot – with features like an anatomical fit
through the toe box, a top-of-the-line World Cup Race Liner, and a narrow 93mm
Racing Last. Power Chassis underfoot adds rigidity. Plus, you’ve got the
adjustable Redster AFS Tongue, which can be positioned for different instep
heights, and the Ankle Retention System on the liner for a solid heel hold and
increased responsiveness. The Redster Solid Sole underfoot provides a precise,
sensitive interface between the boot and alpine bindings.