aussieBum Underwear – Billy Flex Air

We’ve upped the ante on our popular Billy Flex range. Billy Flex Air takes the comfort and retro men’s underwear style of the original Billy and makes him a super star on the sporting field with high performance mesh composition. Billy Flex Air is a high functioning addition to your gym wear with a fully breathable fabric that’s odour resistant, quick drying and effortlessly wicks moisture away from the body. Available in six rock-solid colourways.

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