Pocket Mask for Artificial Respiration One-Way Valve Resuscitation Device I received this when I took a first aid instructor course. It is unopened, but please understand that it has been stored at home before purchasing. Instant purchase OK! I have other items for sale, so please take a look if you'd like m(__)m If you purchase multiple items at the same time, I may be able to offer a discount on shipping, so please comment.