The Bais-Din "Mishpat Sholom" is misinformed and is of the erroneous opinion that shoulder pads do not have to be checked for Shatnez.
I personally asked each of the Mishpat Sholom Dai'yonim "if they know the technical part of shatnez testing". They all responded unequivocally "we know absolutely nothing about the actual testing of Shatnez".
I asked how you can give a Hashgocha on something that you know nothing about. They responded that the Hashgocha is that the individual is an Erlicher yid.
We suggest that each one should ask a "Sheila" by a Shatnz-expert, if they may wear clothing that "shulder-pads" are not checked as a matter of policy.