The tip turns into a round shape, making it easy to put in a dedicated holder. The dedicated replacement sheet for "Rolled Poca" is made with a special heat sheet that uses a film on the skin for efficient heat transfer. Easy to roll up. The toes and toes spread warmth. This is a special heat sheet that has been temperature adjusted specifically for wrapping poka. Please be sure to put it in the pocket of the dedicated "Roll-Up Poka" holder (sold separately). Running time: 6 hours; Maximum temperature: 140°F (60°C); Average temperature: 108°F (48°C).