The Bert Breathe Extension Strap from BlackRapid can be used to create an additional 15" of length to the existing webbing on an extendable BlackRapid Breathe-series strap. It features a male side-release buckle on one end and a female side-release buckle at the other. Taller or larger-framed users who require more length in a BlackRapid Breathe-series strap whose webbing is closed using a side-release buckle mechanism can first separate the male and female ends of that side-release buckle. A Bert Breathe Extension Strap can then be snapped into the extendable BlackRapid Breathe-series strap using the extension strap's male and female side-releases.