For the health and safety of you and others, private products do not support trial use. All returned products will be destroyed. For seven-day unconditional return and exchange, the outer packaging plastic film must be intact and unopened. If there is a quality problem (not man-made damage) within seven days of receipt, it can be returned and exchanged free of charge. If there is a quality problem (not man-made damage) within one year of receipt, it can be replaced free of charge.
Thank you for your understanding and support!