Thong
Skintight superhero clothing has been the topic of much debate, and one of the requirements for wearing the costume was a thong. As Spider-Man, Holland had to get used to wearing a thong underneath his costume. This suit is so tight that it does not have a place for any other type of undergarments.
When Holland first saw the undergarment that was going to be worn with his Spider-Man costume, he acknowledged that he was surprised by how small it was going to be. In spite of the fact that he first refused them, he is now entirely accustomed to them. He was powerless to stop it.