The tight suits they wore were called Ultraburn Battle Suits. As for how the Minotaurs made them, it was unclear. The Ultraburn Battle Suits themselves provided some defensive capabilities, but their most important feature was that they allowed the penetration of Base Mutation substances and didn't obstruct the transformation of Base Mutation carapaces.
The helmets were called Ultraburn Helmets. They functioned similarly to thermal imaging devices, but instead of detecting heat, they detected the energy within Mutators.
Based on the energy levels within a Mutator, the helmets could roughly determine the Mutator's rank.
Lin Shen dismantled an Ultraburn Helmet from a deceased Minotaur and put it on his own head.
The helmet was too large for Lin Shen, with two holes designed for fitting horns. Initially, he thought wearing it would be quite uncomfortable.