A flexible sanitary hose has an inner tube (2), with externally-applied reinforcement (3), an intermediate tube (4), a novel externally-surrounding winding (5) of a hard, preferably solid, unplasticised, round PVC strand of diameter d, and an outer tube (6). The PVC strand is wound with a spacing between individual turns (a-c), amounting to 0.25d - 1d, preferably 0.5d. Preferably the reinforcement takes the form of a long-fibre armouring, evenly distributed over the circumference. The outer tube is transparent; the spiral and intermediate tube have different colours. Conventional fittings are included.
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