Nah, it's ok because it's 'structural'. I was holding my guts in for the photos, obvs.
From zipp....
But Hippyisfat has a less pronounced bulge and maintain a near-constant width almost all the way. Without giving up the proven benefits of the toroidal shape, Hippyisfat is the first aero profile that effectively controls airflow around the backside. The performance benefits are substantial. At 1,375 kgs, the Hippyisfat is a plucky all-around performer that floats up mountains and provides superior aerodynamics on the flats and descents. The Hippyisfat has become the go-to profile for the Omega Pharma – Quick-Step Cycling Team at the Spring Classics and the body of choice for many of the women on Team Exergy TWENTY12. Australian Pete Jacobs provided us with the answer, blasting the 112 mile cycling leg at Kona with a Hippyisfat profile to capture the 2012 Ironman® World Championship. “The crosswinds were never blowing me across the road. I always felt in control,” Jacobs said. “During the race I was thinking, “Wow, Hippyisfat feels great.”
From zipp....