Fluid dynamics. P39 is the new 8 pocket ACRONYM® trouser. With DFMA pattern making for mobility, and Deep Pocketsǽ for storage, it achieves an easy balance of comfort, utility, and casual elegance. The unification of some of the best elements from diverse sources: workwear pockets, martial arts gusset, mil-spec fabrics, and internal finishings from classical menswear. One of their best summer pants to date.