The size of the Air Tamer Travel Iconic A302 was just right to hang over the neck or to clip it on the collar. Besides, there is no odor from the air purifier when it is on. It is a very good device worth a great deal for the price, especially when it was on sale for $43 instead of $72.
The purifier is good to absorb fumes from chemicals or odor of any sort in a medium size room. It would be very effective if seated or with less motion. I could tell the big difference with the effect when I was standing constantly in a room of 700 square feet and when I was moving constantly in a room of at least 1000 square feet.
In the 700 square feet room, the odor from chemicals was gone within 10 minutes. I could not smell it anymore. However, in the 1000 square feet room, I could still smell the odor from chemicals the whole day though it was not as strong when I first entered the room.
Because of the experience listed above, I am suspecting that the air purifier may not be as effective when walking in a mall or outdoor. It is possible that the air purifier will not be useful on a windy day outdoor or when jogging.
Another factor to consider about Air Purifier A302 is the battery. I read a review that all airlines have prohibited having the batteries for personal air purifier on the plane unless if they are checked in. Please check with the airline if considering bringing the air purifier onto the plane.
In addition, the purifier does not alert the user when the battery is low. The only way to know that the battery is gone would be from the blue light which comes on when the switch is on. This is an adjustment the user has to make accordingly.