This Double R-Strap (along with the Double Slim) is the most flexible BlackRapid straps available. Not only does it allow you to comfortably carry two cameras for extended periods at the same time, but you can even separate the two straps for use as a single strap. The Double is MODs compatible.
Topside Material:Ballistic Nylon
Underside Material:1.4 cm thick Foam Pad with Knitted Mesh
Width of webbing:2.5cm
Length of front adjuster: 40cm
Hand/machine washable, air dry.