Giro Eclipse Pro Spherical II Helmet

The Giro Eclipse Pro Spherical II represents the pinnacle of aero road helmet design—built for riders who demand maximum speed without sacrificing cooling or protection. Refined through CFD modeling and wind tunnel testing, it’s Giro’s fastest non-TT helmet to date, trusted at the highest levels of racing.

Product Highlights

• 17% Faster Aero Performance
  Redesigned shell shape and airflow management make it significantly faster than the previous Eclipse generation.
• Spherical Technology™ Powered by MIPS®
  Ball-and-socket construction allows the outer shell to rotate independently during impact—reducing rotational forces while improving comfort.
• Ultra-Lightweight Design (~280g)
  Exceptionally light for an aero helmet, rivaling many climbing helmets while maintaining aerodynamic efficiency.
• 15 Wind Tunnel™ Vents
  Optimized vent placement and deep internal channeling deliver surprising cooling for an aero-focused lid.
• DryCore™ Sweat Management
  Integrated silicone bead channels sweat away from your eyes—critical for high-intensity efforts in heat.
• Roc Loc® 5.5 Air Fit System
  Micro-adjustable retention system fine-tunes fit and enhances airflow by slightly suspending the helmet off your head.

Materials & Construction

• Shell: In-mold polycarbonate with EPS liner
• Impact System: Dual-density EPS + Spherical MIPS
• Reinforcement: Aura II structural arch
• Padding: Ionic+ antimicrobial interior

Every detail is engineered to balance aerodynamics, airflow, and impact protection—without compromise.

Ideal For

• Road racing and fast group rides
• High-speed training where aerodynamics matter
• Riders who want aero gains without overheating
• Gravel racing (where ventilation + aero both matter)

Why Choose the Eclipse Pro Spherical II?

The Eclipse Pro Spherical II hits a rare sweet spot: true aero gains + real-world ventilation + top-tier safety. Unlike older aero helmets that trap heat, this one is designed to stay cool even during long, hard efforts—making it viable for everyday riding, not just race day.

If you’re comparing within Giro’s lineup:

• Aries Spherical → lighter, more ventilated (climbing focus)
• Eclipse Pro Spherical II → faster, more aero (race focus)

This is the helmet for riders chasing every watt of efficiency without giving up comfort.