The tubular flexible body has a wall (3) with a web structure (4) with a number of abutting cells (18,19) bounded by the webs, with at least one spring member (22) per cell. The spring members are preferably formed by bending the webs (7) in a hairgrip shape, with straight portions leading to adjacent cells. The pattern of webs (5,6) is formed by a number of loops (15-17). Each has straight sections (8,9) and a bent section (10), the straight sections enclosing an acute angle. Spring members and the loops define cells.
