Too Many Clothes Pack includes:
[Hairstyle]: Back-Slicked Hair, Morning Dew, Frenzied Rhythm, Machinist Goggles
[Attire]: Birdiepuff Down Jacket, Russet Autumn Breeze, Metal Storm, Brass Age
[Footwear]: Shadow Force, Rocky Trail, Shattered Soundwave, Difference Engine

*Note: Corresponding DLC is required to use these paid cosmetic items.

More details on the official game page of Too Many Clothes Pack ...