Question:

Are we as Muslims allowed to wear any garment which has been made from the skin of pigs?
(The reason I ask, is I once saw a brother wearing gloves out of pig skin and another brother came over to him and told him Muslims should not wear such clothing made from pig skin)

Answer:

As Muslims we are not allowed to wear any garment which has been made from pig skin or any other part of the pig, as all parts of a pig is Najis/Napaak (impure), and cannot be made pure in any circumstances.

It has been stated in Shami- Pg. 204 Vol.1

جِلدَ (خِنزِيرٍ) فلا يَطهَر
(قَولُهُ فلا يَطهَر) أي لِأنَّهُ نَجٍسُ العَين, بمعني أنَّ ذَاتَهُ بِجَمِيعِ أجزَاِئِهِ نَجِسَة حَياً و مَيِّتاً

(Translation)
The skin of a pig, cannot be purified because it is Najis-ul-Ayn (innately impure), i.e. every part of it is impure, whether alive or dead.

Gloves are available in many other materials, so we should be careful before purchasing such items.