Prevent heat exhaustion with this inexpensive, non-toxic, DIY cooling-gel neck scarf. Neck bands only require 2 teaspoons of the dry gel-powder TOTAL. Do not overfill, or, when hydrated, gel will ooze from your scarf. This neck band project is posted many places, but I haven't seen the vest posted elsewhere. If Watersorb isn't available, look for SoilMoist. On watersorb.com.