Does this work with a Baby Trend car seat?
This works on all car seats . Just adjust with the car seat straps
What weight is this suitable for when using in a jogging stroller?
The padded design supports babys head, shoulders and torso in cushioned comfort, providing all-around body support for infants, from birth to 12 months, Ideal for newborn and premature babies, from preemie, newborn.
Do you have to wash it before first use?
Yes, It is machine washable, after receiving any babys items, you should be washed before use.