Tonic Body Treatment Oil WHAT IT IS. An invigorating body treatment oil-formulated with 100% natural plant extracts-to visibly firm, tone and reduce the appearance of stretch marks caused by pregnancy and weight fluctuations. 3.4 oz. Made in France. WHAT IT DOES. Clarins' bestselling body treatment oil-with a nourishing blend of rosemary, geranium and mint plant extracts-visibly firms, tones and improves skin's elasticity, helping to prevent and reduce the appearance