This invention relates to a peristaltic pump hose (10) which includes a length of hose (12) which is made from suitably resilient elastomeric material and a sleeve (14) of flexible reinforcing material which surrounds the elastomeric hose (12) material and extends over the length of the composite hose (10) and to a peristaltic pump including the hose. The elastomeric hose component (12) includes two diametrically opposite wall thickness reducing formations (16) which extend over the length of the hose (12) and the reinforcing sleeve (14) is made from a suitable woven material.