Image 1 of 2 Image 2 of 2 Christophe Robin Regenerating Serum With Prickly Pear Sale Price: $45.00 Original Price: $68.00 A luxurious elixir formulated to help protect against heat and improve the appearance of dry and damaged hair. Quantity: Add To Cart Added! A luxurious elixir formulated to help protect against heat and improve the appearance of dry and damaged hair.