The North Face Unisex Adjustable Military Hat One size fits most. **Adjustable back strap for custom fit. Material: Cotton+Synthetic Vintage washed design Curved peak with stitching detail Lightweight stretch soft shell with a striped fleece backer. TNFTM Apex Universal wind permeability rated at 5-10 CFM (0 CFM is 100% windproof) with high loft striped fleece backer