"How long does it last?" is really two questions. How long does one application stay on your hands, and how long does a bottle last in your gym bag. Here are both, without inventing numbers.

How long one application lasts

It depends on how much you sweat, how much you grip, and how much you used. The pattern in Odyssey Liquid Chalk reviews is consistent. Lifters who used to reapply every set now reapply once per exercise. One customer wrote that one solid application lasted through all her working sets, with no constant re-chalking. Another said it stayed on the whole time.

The mechanism behind that is simple. The alcohol evaporates, and the magnesium carbonate layer bonds to dry skin instead of sitting loose on top of it. Silica silylate gives it a smooth, dry-touch finish. Loose chalk rubs off on the bar; this layer stays on your hand.

How to make it last longer

• Dry hands first. Chalk on sweat does not bond.
• Use less than you think. A thick layer flakes. A thin, even layer holds. As customers put it, a little goes a long way.
• Let it dry fully. A few seconds with your hands open before you touch the bar.
• Top up, do not re-coat. If your palms start to feel slick, a small touch on the worn spots is enough.

How long an 80 mL bottle lasts

Odyssey Liquid Chalk comes in a compact 80 mL (2.70 oz) bottle. Because each application is small, the bottle goes further than its size suggests. How far depends on how many sessions a week you train and how many exercises you chalk for. Lifters who train several times a week and chalk for their main lifts tend to run through a bottle over a period of weeks, not days. If you go through it faster, the usual reason is using too much per application.

Does it go bad?

Keep the cap closed. The alcohol that makes it dry fast will also evaporate from an open bottle, and the chalk thickens. Every Odyssey bottle ships with an extra cap for exactly that reason. Store it at room temperature, out of direct sun, and shake it before use if it has been sitting.

Odyssey Products, Ottawa, Canada. Built by lifters for lifters, with fast international shipping and a 30-Day guarantee.