Men's Sir Isaac S

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The Sir Isaac S is back by popular demand! As our most structured and supportive walking shoe or 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 • 11.6
  • 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

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9 Customer Reviews

Please bring this back on neutral
I wear tested for Newton in 2011 and the first pair I got was the original Sit Issac. To this day, it was my favorite shoe of all time. Please, please Newton bring this shoe back.
March 27, 2018
No More Shin Splints
Went thru two other brands of shoes when i began running and experienced shin splints and aching knees I've been using these for 10 months now and my pain is but gone. great shoe.
December 7, 2017
Highly Recommend
Great shoe! Began couch to 5K training 7 years ago and tried the usual name brand shoes. After troubles with shin splints and plantar fasciitis, a friend recommended the Newton Sir Isaac S; they brought immediate relieve to my aching legs. These shoes have seen me through many races all the way up to my 50K. Best purchase of running gear I ever made!
November 27, 2017
Love these!!
It's about time for a new pair of Newton's and I was dreading having to find something new. The Sir Isaac S is my favorite running shoe ever!! I wish you'd bring these back for the ladies but the men's version has always worked great for me!
August 3, 2017
Amazing running shoes
These are my 4th pair of newton running shoes and I won't run in anything else. These just became my new favorites. Took them out of the box went running and felt amazing.
June 4, 2017
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