Magid CutMaster machine knit 100 percent Kevlar protective sleeves with thumb slot and Velcro fastener offer exceptional cut, puncture, abrasion, heat and flame resistance and welding protection. Pound for pound, Kevlar is 5 times stronger than steel allowing these double-layered sleeves to earn an ANSI Cut Level 4 cut protection rating based on US ANSI ASTM F-1790-97 testing standards. CutMaster knit Kevlar safety sleeves may be washed with no loss of their protective properties and with minimal shrinkage. Each yellow seamless sleeve features a Velcro fastener at bicep to provide a secure fit. Sleeves come in the right length to allow for a snug and comfortable fit that minimizes obstruction while working. Thumb slot on these yellow sleeves styles provide additional protection for the hand and ensures the sleeve stays in place while allowing excellent agility and dexterity. Measures 3-inches diameter by 22-inches length.