So far Ariat, Hunter & Barbour haven't passed the 6mth mark without splitting. My first pair of Ariats weren't used in stables so couldnt blame that, they sent me a replacement pair and they split just the same so I gave up.
My current pair are hunter balmoral wellies and they are barely holding together with less than 1yrs use.
Not sure whether it's worth trying a more expensive brand like Le Chameau or theres some miracle brand that I've not heard of?