They are a reminder of the covenants we made with Christ in the temple. They are a spiritual protection for us. They also remind us to dress modestly. "...it also strengthens the wearer to resist temptation, fend off evil influences, and stand firmly for the right."
Here are more articles if you would like to read them.
The Temple Garment: An Outward Expression of an Inward Commitment
Garments
Is the Temple Garment Unchristian?
Repeat what you just said.
I pray for you. The salvation of Christ needs no silk under-garments for protection.
I am sorry for journey in life, and your after-life.