evo.com | Oyuki Fashion Hats > Redesigned for this year, the Oyuki Boshi Hat has evolved for a better fit and improved performance. This insulated flap hat with a water-resistant shell offers solid protection for resort and backcountry missions. One Size Fits Most Toasty Warm Polar Fleece Lining Hook-and-Loop Chin Strap Closure 100% Nylon Water-Resistant Shell Hitaloft(TM) Insulation | Oyuki Boshi Hat 2026 in Black | Nylon