Neither moisturize the skin or the belt, nor the change of the position or the 'power' of the chest strap has a successful pulse measurement of (not too thick) hairs (!) Performed breast. Since I had ordered a Sigma Rox 6.0 CAD in the course of the same order, I was able to test the PC 26.14 with this belt: here the pulse measurement worked.
Amazon has allowed me a replacement, the result lies reproduce unfortunately. So beautiful would be the possibility that heart rate monitor alone to order with textile or the "low", currently available included chest strap. The heart rate monitor as such is otherwise approximately ideal. Custom layouts are set, training zones, etc. - there is one point more. The only thing I miss is the ability to let the pulse display in percent.