The Factor™ACC offers incredibly efficient power transfer with a comfortable, supportive fit. At its heart, you’ll find Giro's acclaimed Easton® EC90™ ACC carbon outsole. This outsole is light, thin and extremely stiff. That powerhouse base is paired with a breathable Evofiber™ upper that literally molds to the shape of your foot while the micro-adjustable MR-1 buckle allows for precise adjustments on the fly. Other features include replaceable walking pads, a SuperNatural Fit Kit (with adjustable arch supports) and X-Static® Anti-Microbial fiber that reduces odor.
The breathable and lightweight Evofiber™ upper features a low-profile micro-adjustable MR-1 ratcheting buckle closure combined with two velcro®-closures with an offset strap "D-ring" at mid-foot for a great fit, better pressure distribution and to eliminate pressure points.
The Easton® EC90 ACC unidirectional carbon outsole is extremely lightweight and helps to optimize the power transmission. It features lightweight titanium thread inserts for the cleats and replaceable heel pads.
To optimize the footbed, the included SuperNatural X-Static® Fit Kit with adjustable arch support can be optimally adapted to the shape of the foot, to minimize fatigue.
The Giro SuperNatural Fit System combines a cycling-specific footbed with an adjustable arch support kit. By simply choosing from any of the Low, Medium and High arch support included in the kit, riders and fitters can independently adjust arch support to enhance fit and pedaling efficiency while reducing or eliminating common discomforts like hotspots, numbness and cramping. The system is available in men's and women's sizes, and incorporates X-Static® fibers in the footbed to fight odors and other bacteria.
The patent-pending MR-1 Buckle is truly micro-adjustable in tension and release, allowing two-way adjustment in 2mm increments by simply pulling up to tighten the strap or depressing the lever to release it. It also features a quick macro-release for easy removal of the shoe. The design allows grit to be cleared easily for reliable function on- and off-road, and it has an exceptionally low stack height, reducing the likelihood of damage.
Giro worked closely with the engineering staff at Easton® to develop proprietary outsoles that provide the most direct, powerfull connection to the pedals without compromising comfort. Using advanced modeling and proprietary fixturing in the extensive test lab, every outsole is engineered to provide ideal stiffness in 3 zones: Toe Arch and Heel, while maintaining the lowest possible weight and stack-height (as low as 6.5mm). Additionally, the flatter edges of Giro's outsoles allow the shoe upper material to conform to larger or wider feet (what Giro calla the "spillover" effect) without uncomfortable pinching or binding.
Giro footwear is built on proprietary cycling-specific lasts to create a fit that hugs the foot closely without binding, crowding or discomfort. The Precision Fit™ lasts are hand-crafted specifically for cycling footwear in whole and half-sizes that are differentiated between men's and women's shoes, in order to provide the most supportive and precise fit possible in a production shoe.
X-Static® fibers are made with layers of pure silver that are permanently bonded to the surface of the fabric. Siver offers natural anti-microbial performace that helps to reduce odor and regulate heat, so your feet stay fresh and comfortable, naturally.