oxidised reverse culatta phone holderthe cross body leather phone holder, has been cut from a supple full grain 3mm vegetable tanned, washed and tumbled reverse horse culatta leather, with an iron dye treatment that has been brewing in the atelier for 24 months. the solution reacts with the leathers tannins to create an array of blue, black and grey nuances. vegetable tanned leather is an ancient artisanal process that hinges on the delicate balance between timing and temperature. like a