For underfoot support and cushioning, the GTS 12s have a Profile Sockliner that is made with a lightweight, biodegradable material called BioMoGo. BioMoGo works together with Brooks DNA technology in the heel and forefoot to provide customized shock absorption and comfort based on a runner's size, foot shape and speed. For stabilization, the GTS 12's midsole also features Progressive Diagonal Roll Bar® (PDRB®) and DRB Accel technology. These technologies support the foot and prevent over-pronation but still allow for independent movement in the heel and forefoot. Lastly, the GTS 12s have a decoupled heel construction, known as Caterpillar Crash Pad technology, so parts of the heel can move independently of each other and smooth out transitions in the gait cycle.
The 890v2s have New Balance's PL-1 Natural Last and a full-length ABZORB® cushioning insert for added comfort. The insert is removable if you want to use custom orthotics or arch support inserts instead. The midsole also features ABZORB® cushioning technology, as well as innovative REVlite technology, which offers exceptional support and responsiveness. In addition to being extremely durable, REVlite is also lightweight and New Balance claims it is 30% lighter than other foams with a comparable performance in underfoot cushioning and stability.