Nilsson is a Sour IPA from a collab between Edge Brewing and Dutch brewery De Moersleutel. It has a hazy yellow appearance, with a long lasting white head. Nose has coconut, citrus and wheat. Taste is sour, with wheat, citrus and coconut and a moderate bitterness.
A sour ale, also known as wild ale is a category that englobes all type of ales that are brewed with other bacterias than traditional brewing yeasts—Brettanomyces, Lactobacillus, Pediococcus or Acetobacter to name the most common. The composition of this microflora varies a lot even between short geographical distances—probably due to the evolutionary pressure of human brewing activity—making each local variation unique.