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Lady Isaac S

$150.00

Built for Maximum Support

The Lady Isaac is perfect for all foot types and everything from walking to moderately paced workouts. Like all Newtons it offers highly responsive cushioning to maximize ground feel and ease of transition through each stride

New to Newton? We fit snug for most. Add a 1/2 size for best fit.


Lady Isaac Details

Newton Lady Isaac Specifications

specifications

  • Weight (oz): 9.1
  • Drop: 3
  • Support: Stability
Newton Lady Isaac Upper

upper

  • Light and Airy
  • Durable, Comfortable and Breathable
  • Performance Lace and Tongue System
  • Metatarsal Stretch Panel
  • Foot-hugging supportive overlays
Newton Lady Isaac Sole Technology

sole technology

  • Responsive and Agile
  • Full-Foot Newtonium Cushioning
  • Tactical Flex Grooves to Mirror Foot Motion
  • Tuned Posting to Enhance Stability

What Makes Newton Unique?

Lateral view of the Lady Isaac S

Level Platform

Over time, many shoe designs have become thicker, softer and heavier with greater heel heights. In the spirit of making every stride better, Newton shoes feature lower heel to toe drops to put you in a more natural running position.

Top image view of the Lady Isaac

Action/Reaction Technology

The secret formula powering the speed of Newton Running shoes is its proprietary Action/Reaction Technology. Generated by the active movement of the lugs, it creates a responsive, trampoline-like cushioning system that provides quicker bounce-back and loses less energy than a traditional foam-core running shoe.

Bottom view of the Lady Isaac S

Full Foot Cushioning

If you love the responsive yet cushioned feel of the lugs in the forefoot, you'll be happy to find out the same technology exists in the heel. With Newton Running, you get full-foot cushioning and protection.

What Our Runners Think

Customer Reviews

Based on 61 reviews
97%
(59)
2%
(1)
2%
(1)
0%
(0)
0%
(0)
D
Deborah Hebert
Love my Newtons

After I ordered my last pair of Newtons. I haven’t wore anything else. I love them.

E
Elizabeth Bernard
Lady Isaac S is just awesome. Period.

As a 50-something year old female who's ankles supinate, the Lady Isaac S is literally one of the only pairs of running shoes I can wear. I discovered them 8 years ago and have not worn another brand or model since. Thank you, Newton!

S
Sandra McCutchin

Great support..very comfortable. Thank u

G
GK
Good recovery shoe

My go-to Newtons for many years have been women’s Fate, but I switched to the Lady Isaac to accommodate recovery from a traumatic foot injury. The Lady Isaac provides a little extra room in the toe box and more stability for my foot as it recovers. Although a tad heavier and heftier than the Fate, the Lady Isaac is what I need right now and I’m happy to be able to stay with Newton!

A
Amy Mac G
Lady Isaac S

I HAVE TO WEAR THESE SHOES! I am so glad they brought them back. I have issues with my toes and these take all of the strain off of my toes and my arch! My legs, back and hips, and knees....immediately have zero pressure. I feel like a new person. I'm a personal trainer and fitness instructor so these shoes are ALWAYS on my feet! Thank you for bringing them back.

Customer Reviews

Based on 61 reviews
97%
(59)
2%
(1)
2%
(1)
0%
(0)
0%
(0)
D
Deborah Hebert
Love my Newtons

After I ordered my last pair of Newtons. I haven’t wore anything else. I love them.

E
Elizabeth Bernard
Lady Isaac S is just awesome. Period.

As a 50-something year old female who's ankles supinate, the Lady Isaac S is literally one of the only pairs of running shoes I can wear. I discovered them 8 years ago and have not worn another brand or model since. Thank you, Newton!

S
Sandra McCutchin

Great support..very comfortable. Thank u

G
GK
Good recovery shoe

My go-to Newtons for many years have been women’s Fate, but I switched to the Lady Isaac to accommodate recovery from a traumatic foot injury. The Lady Isaac provides a little extra room in the toe box and more stability for my foot as it recovers. Although a tad heavier and heftier than the Fate, the Lady Isaac is what I need right now and I’m happy to be able to stay with Newton!

A
Amy Mac G
Lady Isaac S

I HAVE TO WEAR THESE SHOES! I am so glad they brought them back. I have issues with my toes and these take all of the strain off of my toes and my arch! My legs, back and hips, and knees....immediately have zero pressure. I feel like a new person. I'm a personal trainer and fitness instructor so these shoes are ALWAYS on my feet! Thank you for bringing them back.