Giro SIV Gloves. With retro styling and modern performance, the Giro SIV Gloves feature a perforated nylon upper that fits like a second skin and tailored Super Fit microfiber palm to enhance grip and control. Optimized EVA padding follows the contours of the hand for even pressure distribution and comfort. Proprietary design process with 3 piece palm construction is ergonomically cut to promote mobility, reduce bunching and increase protection. Nylon mesh upper increases breathablity and wicking while sonic welded pull tab makes glove removal a cinch.