Dyneema® Arm Protection is Cool! One of the most distinguishing Dyneema® characteristics is its cool-to-touch property. Dyneema® fibers inherent ability to dissipate body heat and pass moisture from the inside of the sleeve to the outside, results in longer wear time which promotes greater protection. The 9318D7 is a 7 gauge Dyneema® cut resistant sleeve and is 18 inches long. Looking for the best cut resistant sleeves? Look no further than MCR Safety.