Metolius Rabbit Runner

Great for setting up a really-easy-to-equalize belay. Very cost effective for a versatile piece. Girth hitch to belay loop and use the sewn ends on a spring locker for a chicken sling that won't elongate on your harness before you need it. Can be double or tripled to appropriate size. Shorter on the harness (than a 44" spectra sling) when tripled on a biner and overhand knotted, so again less likely to get hung up. Plus fat and bright so it helps to reduce confusion if your smoked and snow stunned. I carry three on my rock and three on my alpine harness. no real advantage for glacier scenarios that I've observed.

These slings can be used as both single length and double length, so you have a choice while looking at a piece to extend as much as you want. I lend them out to friends who find its great for attaching to anchors (I prefer clove hitching with a rope for dynamic strength), the only disadvantage is that you can only use them to equalize pieces in shoulder length configuration, if you try to do equalize as a double length, you can't be redundant, so I also carry double length petzl slings as well.

Mark Twight has been using these things forever, and I'm surprised more alpinists don't. They're heavier than an 8mm, yes, but they don't cluster around your neck, you can pull one off without lowering your arms, and each 1 is either a single length or double length sling, depending on what you need for each piece.