This Article Contains information directly from the Pikmin Games. This article is based off of an Enemy/Treasure/Area/Cave/Pikmin/Character from the Pikmin series of Games.
The Five-man Napsack is a plaid and very worn flannel glove. It is found on the last (5) sublevel of the White Flower Garden, and is held by a troublesome Burrowing Snagret. Once you retrieve the treasure, you'll unlock the Napsack, an item allowing your pilots to take a rest, and your Pikmin may also take you back to the base/ship's pod.
Being in the Explorer's Friend Series, it is part of the Exploration Kit.