The TwinGo Carrier Chest Strap Covers are a great added feature that enable you to cover the chest strap buckle. While you're carrying two babies with the TwinGo Carrier in tandem mode, the baby in front may need a soft place to rest their head when sleeping. If the chest strap buckle is in baby's way, you can offer a cushioned alternative! The chest strap cover fastens with simple poppers, and you can easily place it over the chest strap itself.