It contains an inner drink-safe 100% pure transparent layer, thus guaranteeing top water quality. The reinforcing knitting makes it resistant even to high pressures: it is truly a top-of-the-line hose in terms of performance and reliability.reinforcing knittingflexible and handyalgae-resistant shieldAnti-kink hose with a special knitted reinforcement that guarantees excellent stability at high water pressure, algae-resistant and UV-resistant. The Top-Black hoses are 100% safe as they contain no heavy metals or phthalates. Roll of hose with four-colour die cut cardboard and informative pictograms.