For what it's worth .... these are one of the best fresh water hoses available for RV use.
Their 7/16 inch 400 series or 1/2 inch 500 series are super lightweight and rated for drinking water use. The big and heavy 5/8 inch or 3/4 inch less expensive hoses are not only unwieldy and take up too much storage space for RV use, but those larger diameters are not needed for RV water fill flow rates.
But like all great products, they're not inexpensive:
https://www.waterrightinc.com/collections/watering-accessories/products/slim-lightweight-polyurethane-garden-hose-25-ft(We use one of the 500 series at our residence for gardening. For the RV we carry a hose that flattens as you roll it up on a reel.)