What you should use, sleeping pad or underquilt for the hammock? It depends on what area you will have a rest. In places where you cannot fix the hammock and you should find the ground for resting, hammock pad will be a wise choice. But oftentimes, we can use both on the same occasion. It is a matter of preference. Some say that underquilt is dependable in rather freezing temperature conditions, while the pad needs constant attention from being shifting around when you sleep on it. However for beginners, sleeping pads far more budget friendly than the underquilts do. So, now you can make a choice.