Sniffers Odor Absorbers. Eliminate odors in your cars, RV, closet and more. Sniffers are filled with an all-natural odor absorbing mineral Yellow Lab Sniffer (Tan) Non-Toxic, odorless, 100% natural Sniffers absorb unwanted odors and improve your air quality instead of masking odor with harmful chemicals. Great for pet odors, cigarette smoke, laundry rooms, shoe closets Sniffers are rechargeable for years of service by setting them out in the sun.