The Wilkinson Sword Hydro 5 Skin Protection Advanced spare parts incorporate an innovative shock absorb technology that self-adjusts to provide the optimal level of pressure. They contain menthol to awaken tired skin. The shock absorb self-adjusting technology is based on how you shave to help protect against irritation. 5 blades with protective bars that smooth the surface of the skin to prevent it from getting trapped between the blades. The gel reservoir contains menthol and is activated with water, hydrating with each stroke, helping to protect against irritation. The gel reservoir slides back to access even the most difficult areas such as under the nose. Packaging made with over 90% recycled paper and is also recyclable. Check local recycling facilities. This pack includes 4 x Hydro 5 Skin Protection Advanced spare parts.