The phrase "chest clip" refers to a device or buckle that is used to secure and fasten the straps of a safety harness or seatbelt across the chest to keep it in place and ensure proper positioning and safety. Full definition
It is designed with a quick release, 5 - point safety harness constructed with durable materials including a set of chest clips and shoulder pads. (babyseats.reviews)
I am having a hard time moving past the picture of the baby with the harness chest clip way in the wrong spot - you can't even see it. (bestcarseathub.com)
They're safe and certified and we love the ease of two straps without chest clips. (mountainbuggy.com)