Time for a Skin Shield SPF 50 PA+++ Sunscreen refill? Easy to use:1. To begin, twist your inner tube out.2. Twist off the pump and keep your pump!3. Take your refill tube, remove the lid and twist the lid back on.4. Screw the inner tube into the outer tube.5. Away you go - apply ½ a pump in the AM and at 2-hour intervals after.6. Wash, dry + recycle your refill. Skin Shield SPF 50 PA+++ Sunscreen Refill