Power all your adventures. *Size: Medium-Large size: 56-58 cm Large-XLarge size: 59-61 cm Solar charging on the go Captures solar energy from all angles without any blind spots. Dual USB-A & USB-C ports for charging two devices simultaneously. UPF 50+, sun and UV protection Up to 24% thermal-to-electricity conversion, for a cooler wearing experience IP65 waterproof and dustproof-rated, ideal for hiking, beach trips, fishing, and outdoor activities. Available in two sizes with an adjustable hook and loop fastener for the perfect fit.