Training for seven marathons in wildly different conditions around the globe forced us to get creative with brooksrunning. We installed a treadmill in a hot yoga studio AND in a cold storage freezer to test our gear to the limit! The shoes I ultimately chose: For training on the go / sprint workouts - Glycerin Flex For longer training runs - Glycerin 23 (LOVE the pink!!) To run all 7 marathons - Glycerin Max 2 #BrooksPartner #GlycerinFlex #Glycerin23 #GlycerinMax2