The newton distance s iii stability ladies running shoes have a 20mm heel to toe drop and offer the pop1 platform for a lightweight performance feel and added stability they feature the actionreaction technology in the midfoot and heel to absorb and then return your own energy back to you and have a biomechanical metatarsal sensor plate for a more efficient stride the shoes are great for short and mid distance racing and for weekly speed workouts they incorporate the emb extended med