Features:

• Febreze Fresh Scent of Spring & Renewal
• An easy way to get the Fresh Scent of Febreze into your laundry
• Sheets can also be used to add Febreze Fresh Scent around the house
• Adds softness and static reduction to fabrics in the dryer

Rating : - BOUNCE IS TOXIC! READ THE FACTS HERE
First of all, you can SMELL clothes dried with Bounce from 10 feet away! It is really unpleasant;
BOUNCED CLOTHES STINK. BEST TO USE THE DRYER BALLS that can be found in many catalogs. They are chemical free, without scent. Unbelievable that someone would use 4-5 sheets in a load!
Mostly this product seems to be used by day laborers and recent immigrants who are new and eager Americans, and have not yet learned to BEWARE of some American products

BE CAUTIONED ABOUT THE VOLATILE CHEMICALS IN THESE SHEETS!!!!
Don't take my word for it; read the data:
Fabric softener info from the EPA - Compiled by Julia Kendall/ Environmental Health Network
Symptoms of exposure are taken from industry-generated Material Safety Data Sheets (MSDS)
Chemicals Found in Fabric Softeners/Dryer Sheets
Alpha-Terpineol - Causes CNS (central nervous system) disorders... "highly irritating to mucous membranes" ."Aspiration into the lungs can produce pneumonitis or even fatal edema." Can also cause "excitement, ataxia (loss of muscular coordination), hypothermia, CNS and respiratory depression, and headache." "Prevent repeated or prolonged skin contact."
Benzyl Acetate - Carcinogenic (linked to pancreatic cancer). "From vapors irritating to eyes and respiratory passages, exciting cough." "In mice: hyperanemia of the lungs." "Can be absorbed through the skin causing systemic effects." "Do not flush to sewer."
Benzyl Alcohol - Causes CNS disorders... "irritating to the upper respiratory tract" .."headache, nausea, vomiting, dizziness, drop in blood pressure, CNS depression, and death in severe cases due to respiratory failure."
Camphor - Causes CNS disorders. On EPA's Hazardous Waste list. Symptoms: "local irritant and CNS stimulant" ..."readily absorbed through body tissues" .."irritation of eyes, nose, and throat" ..."dizziness, confusion, nausea, twitching muscles and convulsions". "Avoid inhalation of vapors. "
Chloroform - Neurotoxic. Anesthetic. Carcinogenic. on EPA's Hazardous Waste list. "Avoid contact with eyes, skin, clothing. Do not breathe vapors ... Inhalation of vapors may cause headache, nausea, vomiting, dizziness, drowsiness, irritation of respiratory tract and loss of consciousness." "Inhalation can be fatal." "Chronic effects of overexposure may include kidney and/or liver damage." "Medical conditions generally aggravated by exposure: kidney disorders, liver disorders, heart disorders, skin disorders." "Conditions to avoid: Heat..." Listed on California's Proposition 65.
Ethyl Acetate - Narcotic. On EPA's Hazardous Waste list. "...Irritating to the eyes and respiratory tract" ..."may cause headache and narcosis (stupor)" ..."may cause anemia with leukocytosis and damage to liver and kidneys". "Wash thoroughly after handling."
Limonene - Carcinogenic. "Prevent its contact with skin or eyes because it is an irritant and sensitizer." "Always wash thoroughly after using this material and before eating, drinking ... applying cosmetics. Do not inhale limonene vapor."
Linalool - Narcotic. Causes CNS disorders. ..."respiratory disturbances" ..."Attracts bees." "In animal tests: ataxic gait, reduced spontaneous motor activity and depression ... depressed heart activity ... development of respiratory disturbances leading to death."
Pentane - "Danger - Harmful if inhaled ... Avoid breathing vapor." "Inhalation of vapors may cause headache, nausea, vomiting, dizziness, drowsiness, irritation of respiratory tract and loss of consciousness. Repeated inhalation of vapors may cause CNS depression. Contact can cause eye irritation. Prolonged exposure may cause dermatitis (skin rash)."
CNS = Central Nervous System
Your brain and spine. CNS disorders include: Alzheimer's Disease, Attention Deficit Disorder, dementia, Multiple Chemical Sensitivity, Multiple Sclerosis, Parkinson's Disease, Seizures, Strokes, Sudden Infant Death Syndrome.
CNS exposure symptoms include: aphasia, blurred vision, disorientation, dizziness, headaches, hunger, memory loss, numbness in face, pain in neck and spine.
So it may make sense to simply avoid their use for any reason, including as a fabric softener. This is just another example of "Better Living Through Chemistry." No wonder the sheets can be used to keep flies, mice and mosquitoes away!