Description Replacement straps harness for most Baby Highchairs, baby stroller, pushchair baby seat Features Material: Nylon Color: Black How do you install this on a high chair? How do you secure and attach the belts in the back? Just looped the harness around and back into the one buckle. It was very easy to do. Depending on high chair and model, how we will adapt them.They go through the openings on the back of the highchair.It maybe a little difficult to attach the straps if you are a raw hand. The High Chair Straps was designed to keep your child safe in a variety of situations . Hook on the convenient chair safety straps to keep your child secure while seated in highchairs and strollers. Attach the adjustable length tether strap to keep your child tighted. Package including: 1 x 5 Point Harness Baby Chair Stroller Safety Belt Universal High Chair Seat Belt for Wooden High Chair Stroller Pushchair(not include instructions) Note: 1：Doesn’t fit all high chairs. Depending on high chair and model. Please understand and forgive. 2：This will not work with the old fashion high chairs that do not have the 5 slots/slits (whatever we call it) on the highchair.