I don't have the max weight the strap will float, but he Nikon Coolpix Floating Strap was apparently designed for the Nikon Coolpix AW100. I have an AW110 which is slightly heavier than the AW100. The AW110 exceeds the weight the strap will float. If you can find the specs of the AW100 online, you should be able to determine the weight of the AW100. That's probably about the max weight the strap will float. Hope that helps.