Gardena Comfort Flex Hose.
13mm.
With two spirals working in opposite directions, the hose is pressure-resistant and keeps its shape, but is also flexible and easy to handle (it does not tie itself in knots or twist).
This hose is free of harmful plasticizers (phthalates) and heavy metals, and is of course UV-resistant.
The thick walls make it particularly robust and durable; able withstand pressure up to 25 bar.