Early the next morning, the old butler who came to help Perfikot pack up the tent naturally saw Perfikot's inflatable mattress. He was quite amazed but quickly understood the principle behind it.
This led the old butler to praise, "Using air for support to replace the filling inside the mattress—it's really a genius idea! If we had such things during wars in the past, we wouldn't have been woken by the cold while sleeping on the ground."
"Fu Grandpa, did you ever get woken by the cold while sleeping on the ground?" Perfikot asked as she combed her hair. Though her hair was of good quality, a night's sleep had left it quite tangled.
As he helped Perfikot pack up her belongings, Foster also answered her question: "There were a few times while fighting alongside the master. We launched offensives in winter when the weather was extremely cold, but the army's logistics were nowhere near as good as they are now. We had to sleep directly outdoors, even the master only had two blankets.
