Premium Comfort: Made from high-quality, soft cotton twill for superior comfort and breathability. One Size Only: Provides an adjustable strap back (54-60 cm / 21.25-24 inches). Lightweight & Durable: Weighing only 0.1 kg, it's light to wear yet built to last. Classic Design: Features a pre-curved visor and a sleek front panel, ready to be styled your way. Represent Your Spirit: Showcase the Jackery logo, a symbol of power, freedom, and exploration.