Spatz Windsock2 Aero Oversock

Wind-Tunnel Speed. Calibrated UCI Compliance.

The engineering hallmark of the Spatz Windsock2 Aero Oversocks is its dual-fabric aerodynamic construction paired with an anti-slip dual leg gripper system. Cut tall to sit precisely at the maximum permissible UCI limit, the upper shaft utilizes striated, vertical-ribbed aero Lycra that trips airflow over the lower leg to delay flow separation and cut aerodynamic drag. Down below, a sleek, waterproof stretch main panel hugs the shoe contours tightly around BOA dials and seams, while internal heel grippers and a Kevlar-reinforced toe box ensure the oversock stays anchored without bunching through high-cadence pedal strokes.

Why the Windsock2 Belongs in Your Race Bag:

• UCI-Legal Aerodynamic Height: Cut tall to maximize airflow smoothing across the lower calf while remaining strictly within UCI sock and overshoe height regulations.

• Striated Aero Lycra Calf Section: Vertical aerodynamic channeling trips the boundary air layer to drastically reduce turbulent wake behind the rotating leg.

• Sleek, Waterproof Foot Cover: Form-fitting stretch lower panel smooths over dials, buckles, and shoe seams to shield against front-wheel puddle spray and wind chill.

• Dual Silicone Leg Grippers: Features woven-in silicone alongside an ultra-sticky silicone tape hem to eliminate mid-sprint slippage or annoying downward roll.

• Kevlar Toe Reinforcement: Hard-wearing Kevlar protection layered over the toe box prevents nicks, tears, and abrasive road scuffs when walking or clipping in.

• Sub-Cleat Velcro Fastener: Heavy-duty Velcro closure cinches cleanly behind the cleat interface for a dialed, wrinkle-free aerodynamic wrap and easy shoe entry.

• Internal Anti-Slip Heel Grippers: Tacky internal silicone keeps the rear cuff locked firmly against the shoe's heel counter, preventing ride-up during aggressive out-of-the-saddle efforts.

Technical Specifications:

• Discipline: Road Racing / Time Trial / Criteriums / Fast Training

• Regulations: 100% UCI Legal Cuff Height

• Upper Material: Striated Aerodynamic Lycra (52% Polyester / 48% Elastane blend)

• Lower Material: Waterproof, Windproof High-Stretch Synthetic Shell

• Reinforcement: Kevlar-Infused Toe Guard

• Closure: Low-Profile Under-Shoe Velcro Fastening System

• Weight: ~69g per pair (Size M)

The Alegro Perspective: In competitive road racing and TTs, your lower legs and cycling shoes generate massive amounts of turbulent drag. Upgrading wheels or aero bars costs serious cash, but slipping on the Windsock2 gives you legitimate, measurable aero wattage gains for a fraction of the investment. Spatzwear didn't just make an aero sock, they solved the real-world headache of aero covers sliding down by adding double silicone grippers and a Kevlar toe so you don’t destroy them the second you touch down at a traffic light or staging grid. It’s an indispensable piece of speed equipment.

Wind-Tunnel Engineered Drag Reduction. Dual Silicone Retention. Lock In Your Free Speed with Spatzwear.