Superior Touch 13-gauge composite knit provides extreme cut-resistance with an ASTM cut rating of 4. Gloves are knit with a blend of composite filament fiber, strengthened and supported by nylon and Dyneema. Palms feature a puncture-resistant nitrile coating that foamed to greatly enhance grip when handling oily, smooth, sharp-edged materials like glass and metal. Palms provide ASTM level-2 puncture resistance. Ergonomically shaped seamless knit shell provides all-day comfort. Dyneema is a registered trademark of Royal DSM Group N.V. We will be purchasing these from now on. Thank You very much for assisting us with our glove needs, I will be sure to inform our other divisions of the great long-lasting products that are made by Superior Glove." Eric M., Safety Coordinator, Allied Blower & Sheet Metal