Fidlock recently purchased the Israeli company Gooper and this Hermetic Sling Bag is a product of that action.
Offered in clear or opaque versions, it uses magnets to close the top flap offering a water and sand proof (IPX8) seal.
The internal dimensions are 124mm x 100mm.
I’ve never run with a ‘bum bag’ but this has me highly intrigued any thoughts y’all. Specifically chafing wise.