100% Cotton TWill Exterior with 60% Cotton/40% Polyester French TErry Liner and Hood. Mayfly Features Embossed & Rubberized Snap Buttons, Large Double Chest Pockets with "Otis Pillar" Flaps, Side Pockets, a French Terry Hood with Herringone Drawstrings, and Taping at BAck Neck. Custom Labeling and Scallop Edged Hems with Contrast Fabric. Available in Two Colorways