When wearing a new garment

O Allah, praise is to You. You have clothed me. I ask You for its goodness and the goodness of what ...

Reference:Abu Dawud and At-Tirmidhi. See also Al-Albani, Mukhtasar Shama'il At-Tirmidhi, p. 47.Hisnul Muslim 6

اللّهُـمَّ لَـكَ الحَـمْـدُ أنْـتَ كَسَـوْتَنيهِ أََسْأََلُـكَ مِـنْ خَـيرِهِ وَخَـيْرِ مَا صُنِعَ لَـه وَأَعوذُ بِكَ مِـنْ شَـرِّهِ وَشَـرِّ مـا صُنِعَ لَـهُ

Transliteration

Allāhumma lakal-ḥamdu 'anta kasawtanīhi,'as'aluka min khayrihi wa khayri mā ṣuni`a lahu. wa 'a`oothu bika min sharrihi wa sharri mā ṣuni`a lahu.

Translation

O Allah, praise is to You. You have clothed me. I ask You for its goodness and the goodness of what it has been made for, and I seek Your protection from the evil of it and the evil of what it has been made for.