FSA's revised Riser looks set to become a racers favourite, thanks to a super low weight.
It uses a big bulge and rise in the middle but a rapid taper for maximum control space on the flat outer span. This means some twang but nothing too alarming and it stops buzz nicely too.
A central grip panel and very snug fit with the bar keeps it secure without mad pressure. The carbon Kevlar construction is reinforced under the brake clamps too but not at the tips, so don't go fitting bar ends or cranking your lock on grips up too tight. 20mm rise version also available.