This product comes in a set of two. It can be used quickly without shaking, so even beginners can easily climb with just one. It's also good for when your fingers are dry and slippery, or in dry winter conditions. Using it as a base before chalking up creates new friction. When used as a base, it's effective for those with sweaty hands or in humid conditions like the day after rain. When used alone, it doesn't create chalk dust.