Black T-Shirt is the Black OG T-Shirt
Red T-Shirt is the Corkers OG T-Shirt

Installation:
1. Open OpenIV
2. Go to GTA V/x64v.rpf/models/cdimages/streamedpeds_players.rpf/player_one/
3. Back up all files you will be replacing
4. Enable edit mode.
*For Black T-Shirt*
5. Replace the file uppr_diff_004_b_uni.ytd
*For Red T-Shirt*
5. Replace the file uppr_diff_004_e_uni.ytd