I've tried several Aliexpress carbon gravel bars but I couldn't recommend them due to the shape not comfy. My go to options are Ritchey Beacon WCS Bars (using 7075 Aluminum and is not that much heavier than carbon) and Salsa Cowchipper carbon bars. somehow the bend shape is a lot more comfy. I guess the folks at Ritchey and Salsa did spend a lot of time studying ergonomics.