This is currently our favorite big wall gear sling. It has gear loops in all the right places and and can comfortably handle big loads. It is also the most adjustable of any gear sling and comes in many sizes.
This product is not available at any major retailers and is only available from Yatesgear.com.
If you do a ton of big walls this is the gear sling to get. It is the most comfortable, durable, and functional sling there is. If you are on a budget, a great gear sling that is light and functional is the Fish Double Gear Sling ($46). If you are only going to do a few clean walls, you can get by with the Black Diamond Zodiac Gear Sling (only $30). However, by the lack of multiple gear loops on each side, the Zodiac is not designed for nailing routes or big wall routes that require a big rack. Overall, the Yates big wall rack is the most beefy, comfy, and durable gear sling out there. It's no surprise it's what you see most Yosemite big wall addicts purchasing these days.