Vorgee Missile Clear Lens

I've been having a lot of problems with my swimming goggles steaming up as I swim. I recently bought a couple of new pairs of Speedo's which both steam up after about 8 lengths of my pool (200m). Also all the Speedo's (in the shop at least) seem to be tinted or mirrored which just exacerbates the problem of not being able to see where you are going. Aside from the claustrophobic feeling that comes from clouded vision it also increases the risk of straying into another swimmer's path. I bought these rather speculatively hoping they might be better but unsure given the low price. I have to say I have been very pleasantly surprised. I have swam in them twice (1km+ each time) in the pool and there was no fogging at all. I would have given them 5 stars but they are not quite as comfortable as the Speedo's. Perhaps they could upgrade the design and/or license their anti-fogging technique to Speedo's?! Overall, however, these are my preferred goggles (for now at least).