Camelbak Sternum Protector.Key Features:Sternum CE Level II protector: Protects chest against sudden impact and minor injuries,Integrated action camera mount: Compatible with most action camera mounts,Perforated for added ventilation: Offers airflow and cushioning to maximise comfort and breathability,Fully adjustable: Chest and shoulder straps can be optimised to ensure custom fit for maximum stability and comfort,Pack compatible: Works in conjunction with camelbak impact protector packs,One size: 71 - 116 cm / 28 - 46 in,Weight: 328g / 0lb 11oz.* action camera not included