Only the people who receive gear 3days before your hiking date can get the 3days FREE trial period.
If you order in short notice booking and your hiking date is the day after tomorrow, then you are not possible to get the 3days free trial period because you do not receive it 3 days before your hiking date.
Also, If the delivery date is less than 2days before your hiking date, it is not possible to get 3days free trial period.