Nina’s morning commute is always tough—pushing through crowds into a packed train. It makes her feel stressed and anxious. The air quality is poor today, too, both in and out of the train carriage, but Nina doesn’t have to worry about that because her personal air purifier is working hard to clean up pollution and allergens. Her scent bubble is working at full tilt to keep the invigorating aroma of bergamot and neroli swirling around her nose instead of the ripe perfume of a fellow commuter’s armpit. The scent calms her and makes the journey tolerable. Nina prefers citrus fragrances for this purpose and makes sure her monthly subscription box of eScent cartridges always includes a generous supply.