Magid CutMaster Machine Knit 100 ParaAramid Protective Sleeves with Thumb Slot and hook and loop Fastener offer exceptional cut, puncture, abrasion, heat and flame resistance and welding protection Pound for pound, ParaAramid is five times stronger than steel allowing these doublelayered sleeves to earn an ANSI Cut Level 4 cut protection rating based on US ANSI ASTM F179097 Testing Standards CutMaster Knit ParaAramid Safety Sleeves may be washed with no loss of their protective properties and with minimal shrinkage Each yellow seamless sleeve features a hook and loop fastener at bicep to provide a secure fit Available in a standard width of 3 diameter in lengths from 18 to 26, CutMaster Machine Knit 100 ParaAramid 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 dexterityâ¢100% Para-Aramid machine knit, seamless, extra width, two-ply constructionâ¢Thumb slot and Velcro fastener at bicepâ¢Available in a 3 1/2" diameter in lengths from 18" to 26"â¢Exceptional cut, puncture, abrasion, heat and flame resistanceâ¢ANSI Cut Level 4