asics women's gel-nimbus 21, grey/silver, 10 b asics the gel-nimbus has been the go-to shoe for anyone looking for a soft and smooth ride. equipped with asics' new flytefoam propel midsole material you will experience a more responsive ride and unrivaled propulsion. this high cushion neutral running shoe is great for all levels of runners and walkers looking for a plush underfoot feeling.