Avoid buying over priced dumbbells and kettlebells!
Simply fill the sand filler all the way up for 20 LBS and half way for 10 LBS. Each sand filler has double layer of Velcro, folding with outside binding reassuring you can throw them around without any sand leakage. Please make sure each sand filler is completely sealed and double folded.
Sand may vary in the density and weight. Please visit our FAQ page for more details.