Gel pack cap for the head, usable for both hot and cold therapy. This type has a bit of weight to it, so you should be able to sleep soundly without light leakage. - Model Name: gel pack cap - Color: Gray - Function: For both hot and cold use (HOT/COLD) - Usage Instructions: When using cold, chill in the refrigerator for about 10 minutes. - Target: For the head Thank you for viewing.