Our #1 Accessory recommendation to enhance enjoyment of using a TowWhee. For quickly connecting the TowWhee to the trailing bike this small loop & great feeling climbing style carabiner make it easier & faster than looping through itself stand alone. This loop can stay on the trailing bike permanently. The carabiner stays on the TowWhee for built-in storage. You can hook the TowWhee into a loop to carry over your shoulder, wrap the TowWhee around your waist twice like a belt or clip to your pack.