A hot stone massage is a type of massage therapy. It used to help you relax and relieve tense muscles and damaged soft tissues, promote sleep, keep beauty and ......Our stones are made of basalt, a type of volcanic rock that retains heat. Why 8 Stones? (The best combination) On the basis of 6 massage stones, plus 2 smaller stones, used for small parts of the body, such as forehead, neck, shoulders, etc. The stones may be placed: * On your stomach * On your chest * On your face * On your palms * On your feet and toes Who Can Use Hot Stone? * Suitable for those who long to use computers, mobile phones or other electromagnetic radiation class equipment; * Often can't sleep well, listlessness, who need to improve physical energy; * Immunocompromised, the need to improve the physical person; * Waist, shoulders and neck stiffness or pain person easily; * Mental stress, people need to continue to restore the spirit of relaxation. How To Use It? Place stones in a saucepan and add enough water to cover them. Put the saucepan on the stove and turn the burner on to medium low. Attach a candy thermometer to the inside of the pan to check the temperature of the water. Remove the pan from the stove when the water reaches a temperature between 105-125? (40.5-51.66?). Heating the stones to the right temperature will take about 30 minutes. Material: Natural basalt Stone The Package Includes: * Black Velvet Bag x1pcs --- easy to store your massage stone, easy to carry * Round big stone x 3pcs----- 3.15 "* 3.15" * 0.8" * Oval big stone x 3pcs ----- 3.15 "* 2.4" * 1" * Oval medium stone x 2pcs ----- 2.4 "* 1.9" * 0.6"100% refund guarantee:We believe you will love our products!Our professional customer service department will make every effort to ensure your satisfaction,we will provide a month. MAINTAIN COMFORTABLE TEMPERATURE:Select 100% natural basalt rock,after grinding and polishing,it can better maintain comfortable temperature.It is perfect for people often using computers and mobile phones. Note: As these are natural lava rocks,some slight variation in size, colour and texture is inevitable. FUNCTION:These massage stones can be used professionally or also you can use them at home.it can relieve tension and pain,relax muscles,improve blood circulation and promote metabolism,and effectively adjust the state of life and work. Various sizes suitable for different locations and Helps loosen tense muscles and are very pleasurable to the recipient. BEST QUANTITY AND SIZE:6 Placement Stone (3.15"*3.15" and 3.15"*2.4") and 2 Working Stones (2.4"*1.9"). Note: Other sizes can also be used as working stones or placement stones,as needed.