SOFFskins are wearable garment ensembles functioning as upgrade filters for frequencies of presence. They boost various spectra through a modulation factor. Their influence affects not only the player wearing them, but also their immediate environment. SOFFskins emerge from the desire to become symbiotic with surroundings, whether social, physical, digital, imaginative, or emotional in structure. They can be transferred between players or grown together. Each SOFFskin comes with a Skincard, displaying Featured Creatures, its modulation factor, and the enhanced correlations across presence spectra. In the game Evoluti0N, SOFFskins function as valuable tools for producing interoxygen of a specific quality.