Offering intelligent control, the Sir Isaac stability guidance trainer is designed for runners of all levels, including beginners, who are committed to natural form running and need medial posting for mild pronation. It is ideal for beginning runners, people who run/walk or runners transitioning from a heavy heel strike to a comfortable midfoot landing position. Whether you follow Chi, Pose, Evolution, barefoot running or just want to run better, the Sir Isaac S allows you to run naturally, with greater efficiency and less overuse injuries (like Achilles tendonitis and plantar fasciitis). Recommended for any distance and general fitness, walking or working out in the gym.

UPPER

• Highly breathable, closed mesh
• Slip-proof laces with heel-securing double eyelets
• Lightweight ergonomic support strapping
• Metatarsal stretch panels for foot adjustment
• Reflective heel logo and toe tab

MIDSOLE

• Single-density, high rebound EVA
• Second generation Action/Reaction™ technology midfoot and heel
• Midfoot support chassis for added stability
• Beveled heel and toe
• Met-flex enhanced midfoot flexibility
• Enhanced sock-liner that increases energy return and protection
• Accommodates orthotics

OUTSOLE

• Durable high-traction actuator lugs
• Increased toe spring
• Pronounced heel rocker
• High-wear carbon rubber with traction tread

GREEN FEATURES

• 100% recycled laces, webbing, insole topcover
• 100% recycled PET upper mesh
• 100% recycled box, packaging
• 10% recycled outersole rubber