Camp Mach Express Dyneema 60cm. The Mach Express Dyneema has it all. A superlight 8mm Dyneema sling connects the lightest carabiner in the world to the new superlight, full-size Photon Wire. The Nano 23 is great for slings and chains and the Photon Wire makes for easy clipping. Thin Dyneema slings are a great choice for alpine draws because not only are they light, but they do not absorb water so they wont get soggy in wet conditions or freeze up.