Based on their own special materials they use in their drysuit, track record and reputation in the UK and others who use it outside the UK. You will rarely see or hear about Seaskin in the UK. In fact, most people I have talked to while living there in 2019 know about O3 while they never heard of Seaskin. These people are top notch tech. diving instructors as well as dive operators and active divers. I have visited dive shows, dive centers and communicated with MANY instructors there during the time I lived in the UK. It isn't a scientific survey but this is what I come across while contemplating what brand of suit to go with there. There are other known brands in the UK but Seaskin isn't one of the brands mentioned or recommended by the many people I have talked to there. This doesn't mean that Seaskin is a bad suit, it just means that it isn't anything special and not the high quality with the track record or reputation other mfg. have in the UK.