The MA-1–type J90-SS has been pared down to a singular potent package. Deceptively simple. Seriously resilient. With ACRONYM specific features such as: bilateral lower pockets with rearward mesh catch, 2-stage center front closure, removable JacketSling, sleeve anchor loops, AuxZip compatible layering, and one hundred percent non-binding fit. Works as an outer layer on its own, or underneath any hard or lightshell. J90-SS is made from remarkably impervious Swiss-made Schoeller® WB-400™ softshell fabric; abrasion resistant, water repellent, 4-way stretch, moisture managing, and fast drying.