Men's Sir Isaac S


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The Sir Isaac S is back by popular demand! As our most structured and supportive running shoe, the Sir Isaac S is for runners who want stability in a responsive, cushioned ride. Medial posting and midfoot support help to offset pronation.

Product Details

  • Item number • M011316
  • Weight • 11
  • Platform • 4 lug
  • Heel-to-toe drop • 4.5mm
  • EMB • Yes


  • Highly-breathable closed mesh

  • Slip-proof laces with heel-securing double eyelets

  • Lightweight ergonomic support strapping

  • Metatarsal stretch panels for foot adjustment

  • Reflective logo and heel tab


  • Durable high-traction lugs

  • Increased toe spring

  • Pronounced heel rocker

  • High-wear carbon rubber with traction tread


  • High-rebound EVA

  • Action/ReactionTM technology in the midfoot and heel

  • Midfoot support chassis for added stability

  • Medial posting to offset pronation

  • Beveled heel and toe

5.0 / 5.0
2 Reviews
5 Stars
4 Stars
3 Stars
2 Stars
1 Star
I don't just like this shoe I love this shoe. If weight isn't an issue (not that it's heavy at all) this is the shoe for you. Very durable.
October 24, 2016
35630, AL, US
2 months ago
I run to:
Crush the competition
Weekly MIleage:
51 miles and up
Thank You!!!
The return of the Sir Isaac S is the best thing that has happened. Thank you Newton for bringing back the most comfortable running shoe I've ever worn.
November 21, 2016
Tulsa, OK, US
1 month ago
I run to:
Maintain my sanity
Weekly MIleage:
21-40 miles