Palms are cut from kangaroo skin for better feel, while the rest of the gloves use more durable cowhide. That's top-grain, uncorrected cowhide, which is more expensive than stuff with a grain pattern pressed into it as used in lesser gloves, but much tougher. Inside there's a full Kevlar knit liner for extra abrasion resistance. Kushitani's proprietary K-Foam adds impact protection where hands are likely to smack down: the knuckles, the edge of the palm, the top of the forearm and elsewhere. Why no hard carbon-fiber armor? K-Foam is more comfortable-especially with the elastic thread used in the GPR5's pleated panels across the back of the hand-and it can't shatter or cut you in a nasty crash.