Shrink bubbles do exactly what you think they would. Once they envelop you, they slowly shrink until you're completely vacuum packed inside, with your clothing dissolved along the way. It's recommended to not struggle and to just get into a comfy position, lest you end up squeezed into a tight ball tie. Thankfully they only last for about 4-5 hours before popping- but since they're traps often employed by Demons, it's not guaranteed you won't be safe once they do