Cask Reserve Amber sits outside IMPOSSIBREW's core range - it's a limited edition, unfiltered pour brewed to 0.5% using the same cryogenic fermentation method as their other beers, meaning no dealcoholisation. The recipe uses Social Blend v1.1, which layers in magnesium alongside the usual L-theanine and ashwagandha. Pours hazy amber with warm copper tones. The nose is malty and grain-forward: toasted grain, a hint of caramel, some pine. On the palate, toasted rye gives it a bready backbone with caramel malt sweetness and a light citrus note. The body is smooth and fuller than the core range. It finishes dry with a clean, lingering bitterness - closer in feel to a British best bitter than a modern hazy craft ale. At 0.5% it's one of the more character-driven options in the alcohol-free amber ale space. The fuller body and dry finish give it a bit more substance than the lighter lager and pale in the range.