Make sure there are plenty of vents too as these will both keep your head from overheating, and also make sure your goggles dont fog up
I recommend the Trek Ballista (available here and here), Specialized S-Works Evade 3 (here, here, here, and here), and Kask Utopia Y (here, here) aero helmets for enthusiasts with long oval or intermediate oval head shapes
Buoyancy calculations must account for net weight when submerged
This will give you a good shot at a 100-fish night
With building heat and humidity
Equipped with MIPS technology, the Switchblade is triple-certified to CPSC, EN-1078, and ASTM-1952 Downhill safety standards and thats with or without the chin guard