Vault City Cloudy Krush Dry-Hopped AF Sour is a collaboration with We Can Be Friends, a Leeds-based brewery, and one of several expressions within Vault City's Cloudy Krush series. Vault City began in Edinburgh in 2018, emerging from Steven Smith-Hay's kitchen before growing into Scotland's largest sour beer producer. The alcohol-free Cloudy Krush represents the AF end of a brewery that has built its reputation on fruit-forward and fermentation-driven sour styles.