Like a jock strap for your camera, or atleast that's what it looks like.
Designed to hold the EOS Rebel T6s EF-S 18-55IS STM Kit, EOS Rebel T6i EF-S 18-55IS II Kit, EOS Rebel T5i EF-S 18-55IS STM Kit, EOS Rebel T5 Kit , EOS Rebel T3i EF-S 18-55IS II Kit and EOS Rebel T3 Kit