The Adrenaline GTS 20 supports the foot at the necessary positions through firmer sections along the sides, applying less pressure to the knees than the previous model. Not as rigid through the middle of the shoe as previous versions, and more cushioning under the heel for a softer landing.
The Echelon 7 offers medium support whilst being soft underfoot. Its spacious and breathable upper is suited to high volume feet. Durability in enhanced with a solid rubber outsole.
The Ariel 20 controls the foot through firmer sections along the sides, combined with a broad base of support in the area under the arch. Brooks uses a wedge under the heel to tilt the foot outwards, making this shoe unsuitable for orthotics.