The Giro Trig MIPS is a perfect helmet for progressive riders looking for freestyle steeze on the mountain. The In Form Fit System uses a dial to get that perfect fit. Removable Ear Pads and Goggle Retainer help you customize your look. Giro's Thermostat Control allows you to regulate the airflow through the helmet to prevent overheating and help you always keep a cool head when you are lining up a sick lap through the park. MIPS (Multi-Directional Impact Protection System) has a low-friction inner shell that rotates upon impact to absorb the energy and not transfer it onto your head. Stack Vents keep air moving across the top of your goggles so they will not fog up when you are hiking up to keep hitting that giant booter to nail your sick tricks. MIPS (Multi-Directional Impact Protection System) Hard Shell Construction In Form Fit System Vertical Tuning Thermostat Control Stack Ventilation Removable Goggle Retainer Removable Ear Pads Compatible with Outdoor Tech Giro Audio Systems Seamless Integration with all Giro Goggles.