FISCHER RC4 Free 105 LV VAC BOA Black Women's Piste Ski Boots (U05625)

The Fischer RC4 Free 105 LV VAC BOA Black represents the absolute pinnacle of high-performance ski boot innovation engineered exclusively to dominate the groomed trails. This model completely eliminates compromises between extreme race-level foothold and daily comfort, blending the "Racing" DNA of the legendary RC4 line with modern, high-precision fit systems for technical female skiers looking to carve perfect turns at high speeds.

The most disruptive element on the piste is the integration of the BOA® Fit System (H+i1) into the lower part of the outer shell. Instead of traditional buckles that can apply uneven top-down pressure, the BOA system distributes tension homogeneously around the entire forefoot. This wraps the foot with micro-precise accuracy to eliminate dead zones, lock the heel in place, and immediately optimize lateral response and edge control on hardpack snow. This structure is paired with a narrow low-volume last (LV - 98 mm), which wraps the foot compactly for surgical precision.

The outer shell is manufactured from Vacu-Plast, an exclusive polymer that ensures the 105 flex rating remains consistent and elastic, preventing the boot from turning into a "rock" on the coldest winter days. Thanks to VACUUM technology, the outer shell can be fully heat-molded at 80 °C by specialized bootfitters, allowing the boot to be custom-shaped around the unique anatomical complexities of the female foot.

On the inside, the premium iFZ Performance WS liner features a specific lower-profile cut that respects the lower insertion of the female calf muscle, significantly reducing fatigue. To battle the freezing temperatures typical of early morning laps, the lining is endowed with Primaloft® fiber insulation, guaranteeing warm and dry feet all day long. The setup is rounded out by a 45 mm upper power strap for a solid lock and revolutionary GripWalk® soles that transform walking through the resort with a natural foot roll and unrivaled slip-resistant traction.

Technical Parameters

• Ski Type: Piste / High Performance All-Mountain.

• Flex Index: 105 (High, responsive stiffness, ideal for advanced to expert female skiers seeking maximum precision and aggressiveness on-piste with a progressive flex).

• Last Width: 98 mm (LV - Low Volume, narrow surgical-precision fit based on anatomical Fischer Scan-Fit® data).

• Shell Closure System: Integrated BOA® Fit System (H+i1) on the instep and forefoot area for millimeter adjustment, seamless foot wrapping, and enhanced edge control without pressure points.

• Shell Technology: VACUUM fully heat-moldable shell at 80 °C for an exact anatomical match to the unique foot contours.

• Shell Material: Vacu-Plast (Fischer's exclusive polymer that guarantees a consistent, elastic, and predictable flex regardless of outdoor temperature changes).

• Liner: Women's specific iFZ Performance WS liner (Heat-moldable, featuring individual Velcro fitting zones and a cuff tailored to female calf anatomy).

• Thermal Insulation: Highly efficient Primaloft® fiber integrated into the liner to keep the foot warm and dry under extreme cold conditions on the slopes.

• Soles: Pre-mounted GripWalk® (GW) (Offer maximum safety, grip, and traction across slippery or icy terrain and a natural foot roll while walking).

• Upper Buckles: 2 micro-adjustable high-resistance aluminum buckles on the cuff.

• Power Strap: 45 mm high-performance velcro strap for instant energy transfer.

• Recommended Level: Advanced - Expert.