Introducing the new Hydro Comfort Skin Reset razor blades designed to comfortably tackle up to 7-days of hair growth, without pulling tugging, or irritation. Compatible with all Wilkinson Sword Hydro Razors. Comb guard separates hair to prevent tugging and pulling to give a comfortable shave even with 7 days of long stubble. Water activated gel pools hydrates throughout each shave, and help protect from irritation. Easy rinse blades for less clogging. Flip trimmer for precise trimming and to get into the hard-to-reach spots. Packaging made from more than 90% recycled paper and recyclable (check local recycling facility). Preparation and Usage: For optimal performance change the cartridge when one or more holes of the gel reservoir appear empty.