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 9318DT10 is a 10 gauge Dyneema® sleeve with a silicone grid pattern on both sides and measures 18 inches in length.