After the routines, your penis will try to turtle or shrink. This is when you need to stop the penis from doing that. Never let it shrink or turtle. You need to force it to remain at flaccid at all time, even during rest. This is why we wrap.
When you reach fatigue points or zones, your penis will fight back with you known as "tug back". The moment you come out of the pump or from the stretching routines, and it just doesn't want to remain at a flaccid state, you need to rest. This happens very commonly when you being aggressive with the lengthening processes. Rather than just rest in a turtle or shrink size, I wrap to keep it at flaccid. This very critical during cold days. You don't want to turtle or shrink and promotes constant warmth and blood flow. This is where we want the penis to repair and not place itself into sleep/reserve mode.
If you know and see your penis does not turtle or shrink during rest phases, you can allow it rest without wrapping.