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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
Learn More About Newton's Technology

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 64 reviews
97%
(62)
2%
(1)
2%
(1)
0%
(0)
0%
(0)
R
Rebecca
Improved Lady Isaac

I've been running in Lady Isaac's for years. A while back they stopped making them momentarily so I ordered as many they had left in stock. The new pair of Isaacs are so much lighter then previous but the stability and form are better than ever. I love them even more.

C
Cristi Silva
Love these shoes!

This is probably my 5th pair of Newtons. I bought these for cross training instead of running and they are great, I feel like there is some extra support for my HIIT classes.

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!

C
Camille Baker
Walking shoe

Very comfortable so far. Had to go a full size up for a good fit but happy

123

Customer Reviews

Based on 64 reviews
97%
(62)
2%
(1)
2%
(1)
0%
(0)
0%
(0)
R
Rebecca
Improved Lady Isaac

I've been running in Lady Isaac's for years. A while back they stopped making them momentarily so I ordered as many they had left in stock. The new pair of Isaacs are so much lighter then previous but the stability and form are better than ever. I love them even more.

C
Cristi Silva
Love these shoes!

This is probably my 5th pair of Newtons. I bought these for cross training instead of running and they are great, I feel like there is some extra support for my HIIT classes.

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!

C
Camille Baker
Walking shoe

Very comfortable so far. Had to go a full size up for a good fit but happy

123