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 inside of the sleeve to the outside, results in longer wear time which promotes greater protection. The 9318D7T is a 7 gauge Dyneema® cut resistant sleeve with thumb hole and is 18 inches in length. Looking for the best cut resistant sleeves? Look no further than MCR Safety.