After a fair bit of testing and an "in-race test" I can safely say that the HEAD Aero is fantastically designed for swimrun. This makes perfect sense - HEAD Swimming have been designing specifically for swimrun long before the other wetsuit brands. It shows.
The main thing they have recognised, and catered for in this suit, is the fact that neoprene isn't great for running in.
The neoprene from the waist down is ultra flexible and soft, it almost feels like you are running in a pair of Nike Dri-Fit running tights. For anyone who has graduated to a swimrun specific wetsuit after years of struggling in old wetsuits that you customised then this will feel like heaven on the run sections.
Like everything in swimrun, it's give and take. What you gain in flexibility for running, you lose in buoyancy for swimming.... not to worry just get a slightly bigger pull buoy. I use the HUUB Big Buoy. So, overall, nothing lost.
Above the waist there's a mix of Nano-glide neoprene from 1.5mm to 4mm air cell panels in the chest. This mix is designed to keep you buoyant and flexible.
Could it be better? There's no pocket, pockets are becoming standard in swimrun wetsuits... however this doesn't bother me as I am happy stuffing anything I need inside the wetsuit - with the full frontal zip it's easy access.
I love this wetsuit and I look forward to many more races in it. The HEAD Aero has a base of 2 mm extremely flexible neoprene. Glideskin neoprene in upper part with 4 mm Air cell-panels placed on the chest for great buoyancy. 1.5 mm around arms and shoulders for extra flexibility and movement. Lower part is designed for optimal running properties. Nylon covered neoprene for best balance between flexibility and durability. Front zipper to easily open up while running. Comes with an small and effective whistle for security. Heat taped seams for individual length adjustment of both arms and legs.
You can normally find a discount online and pick one up for between £200 & £300.