Stay cool this summer with speed cooler. Keeping your temperature cool on your head and around your neck can help you by easily keeping your body temperature down. Apply cool INSTA speed cooler around your neck. Keep your INSTA speed cooler for 5 to 10 minutes in cold water below 41℉ for immediate use. Completely submerging your INSTA speed cooler in cold water helps to freeze it faster. When INSTA speed cooler loses its cooling senation, simply put it back to refrigerator or dump it in to cold water or ice cooler for fast freezing. The cooling sensation lasts about 1-2 hours, depending on the surrounding temperature(indoor, outdoor, your body temperature) Easily lower your temperature. Safe & Comfortable TPU material. Reusable 4 different color options (White / Dark gray / Blue / Pink ) Search for "SPEEDUSA" for more SPEEDUSA offered products WHY CHOOSE INSTA SPEED COOLER? - MADE IN KOREA, SPEEDGOWN’S PATENTED DESIGN WITH SAFE AND NON-REACTIVE REFRIGERANT INSIDE. WHAT IS PCM? - THROUGH PHASE TRANSITION, SOLID TO LIQUID TO SOLID, YOUR INSTA SPEED COOLER ABSORBS A LARGE AMOUNT OF HEAT WHILE KEEPING YOUR BODY COOL AND COMFORTABLE. PCM INSIDE INSTA SPEED COOLER RELEASES ITS STORED HEAT WHEN PUT BACK INTO COOL REFRIGERATOR OR EVEN COLD WATER.