469,483 deals (and counting)
from around the web, shared and ranked by a community of deal fiends like you.
Go to Deals.Woot.
These are not safe to use in car seats. Fine for strollers, a big no-no for car seats.
You're not supposed to add anything to a car seat that didn't come with it from the manufacturer, as it can change the crash dynamics, fire-safe materials, etc.