Marble stones, chilled. Used alongside warm work rather than on their own.
Cool and smooth against the skin, and noticeably heavier than they look.
Sanitation is demonstrated by your LMT Trainer. Follow the validated procedure for the tool in front of you — and never improvise one.
Your LMT Trainer will walk you through this in the room.
What cold stones do is still being validated. Describe the cold and let her therapist speak to her body.