THE LEDGE(TM) MIPSA(R) HELMET FEATURES A CLEAN, MINIMALIST SKATE-STYLE DESIGN WITH HARD-SHELL CONSTRUCTION BUILT FOR STREET AND PARK RIDING. Head to the park in style with the Ledge(TM) MipsA(R), a hard-shell helmet that offers our self-adjusting and removable Auto Loc 2 fit system, with the added benefit of Mips, the Multi-Directional Impact Protection System. SPECS CONSTRUCTION HARD SHELL CONSTRUCTION EPS FOAM LINER VENTILATION STACK VENT(TM) TECHNOLOGY SUPER COOL VENTS FIT SYSTEM AUTO LOC(TM) 2 FIT SYSTEM - REMOVABLE, DURABLE SELF-ADJUSTING FIT SYSTEM DESIGNED TO TAKE THE HASSLE OUT OF FITTING A HELMET. A SUPPLE ELASTIC FIT BAND AT THE BACK OF THE HELMET MERGES WITH FIXED-POSITION STRAPS, WHICH ADJUST TO CRADLE YOUR HEAD WHEN YOU SET THE SYSTEM TO ONE OF THREE CIRCUMFERENCE SETTINGS. ON-THE-FLY VERTICAL TUNING - ACCOMMODATES DIFFERENT GOGGLES AND HEAD SHAPES FOR A CUSTOM FIT FREE OF GAPER GAP. PRODUCT WEIGHT 500G (SIZE MEDIUM) ELECTRONICS COMPATIBILITY COMPATIBLE WITH AFTERMARKET GIRO AUDIO SYSTEMS BY OUTDOOR TECH