The fouFIT Cooling Collar is a highly absorbent, slow releasing collar for your dog that will keep him cool for long periods of time. By running water over the collar, the unique gel beads found inside of the collar will absorb the water and transform into a gel, slowly release the water through evaporation. Keeping your dog cool and Protected from heat stress, restrictive airway and keeping his body temperature low during warm days. The Cooling Collar reusable for 30+ times and can stay cool for up to three days.