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 9318D7M is a 7 gauge plain Dyneema® sleeve that is 18 inches in length. The dark color of this sleeve helps hide dirt and grime, keeping it looking new longer. Looking for the best cut resistant sleeves? Look no further than MCR Safety!