Instead of a large rubber pad area to create friction, the aim is to reduce as much friction as possible by use of a smooth curved surface - thus underarm irritation and soreness are eliminated.
(the aim; is; to reduce as much friction as possible by use of a smooth curved surface - thus underarm irritation and soreness are eliminated)
the aim
is
to reduce as much friction as possible by use of a smooth curved surface - thus underarm irritation and soreness are eliminated