Review on SPRI Chalk Block & Chalk Ball: Enhance Performance in Gymnastics, Rock Climbing, Bouldering, Rings, Weightlifting, Pool Billiards by Erik Haynes

I think the selling price is the main selling point of this chalk but the quality reflects that. Chalk breaks/crumbs easily and wears out fairly quickly. I keep mine in my Crown Royal bag and get a handful of chalk when I go lift weights, but I'll probably switch to better quality chalk when it runs out. The particles are floating all over the place because it's such a light chalk that gets everywhere. Worth the money you pay for it, but spending a little more money and getting a heavier/more durable chalk is probably a better option.