The synthetics

These ingredients are on Burt's Bees "Avoid" list:

Cleansers
Sodium lauryl sulfate
Sodium laureth sulfate
Sodium myreth sulfate

Petrochemicals
Petrolatum
Mineral oil
Paraffin

Preservatives
Parabens (all of them)
DMDM Hydantoin

Chemical sunscreens
Oxybenzone
Avobenzone
Octinoxate

Moisturizers
Propylene glycol
Butylene glycol
Polyisobutene