Over at Cuticura they want you to take their 2-week challenge. You sign up and grab a FREE sample to use for 14 days. They just ask you to leave a review on their site of your experience after using it for 14 days.
They have 500 to give away between June 2017 and October 2017 so get over and sign up for a chance of grabbing one yourself.
For more details and to sign up, click the GRAB FREEBIE button which will take you over to their sample web page. All instructions and terms and conditions are there.