No need to take the cumbersome child seat with you - 
all you need is the compact
FreedomRide^TM Child Safety Harness
Conforms to all applicable Federal Motor Vehicle Safety Standards

JoeySafe is also known and sold as "FreedomRide"
We are now shipping the "Freedom Ride"
that comes with a waist strap.
Our FreedomRide, and Joeysafe are idendtical,
except for the waist strap.   
Twelve years of extensive research and testing have produced the Freedom Ride / JoeySafe^TM Child Safety Harness, which, once fitted correctly as instructed, can then be placed on and off the child with ease

...

• A cord loop for walk-around leader in rear back pad.
• Easily put on your child before he or she is placed in the vehicle. The Child Safety Harness is then easily secured to the vehicle's seat belt. To remove the child from the vehicle, simply unbuckle the seat belt.
• Strong, compact, comfortable. Allows children to sit comfortably without overly restricting their movement.
• Fits any child who :
  - weighs between 20lb. (9kg) to 60lb. (27kg)
  - measures 50 inches in height or less
  - is capable of sitting upright alone
  - is at least one year of age
• Complies with all U.S. Department of Transportation Federal Motor Vehicle Safety Standards.
• Designed for use in any motor vehicle where seats have factory installed seat belts for the lap or lap/shoulder combination design.
• Complete Child Safety Harness instructions located in the chest pad pocket, you can also view these same instructions by clicking here.