I’m interesting in reviews of the new Circuit X that ULA is now selling for $349. They use various types/weights of xpak materials. Since the packs are pretty new, I am going to wait to read some reviews before deciding whether to buy one to replace my tried and true 2013 Circuit which is still in great shape. $349 so it’s quite expensive. The main attraction is waterproofness. The weight doesn’t seem to be much different.