The Brooks Glycerin 19 is a highly cushioned and lightweight trainer ... In the US, sizes range from a 5-13 in the women’s, with narrow, medium and wide fit available. In the men’s, sizes range from 5 ...

This technique isn’t a new innovation; Brooks started infusing their foams back in 2020 when the Hyperion Tempo dropped with DNA Flash foam. The Glycerin 21’s midsole was recently updated with ...