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Women's Isaac

$145.00

Meet The New Lady Isaac

Introducing our most cushioned model ever, powered by a super stack of ultra plush NRG+ foam and a new generation of ART™ technology to create the perfect balance of cushion and springiness to take your run in entirely new directions

Sustainably Constructed, Certified Vegan


New to Newton? We fit snug for most. Add a 1/2 size for best fit. (US Sizing Displayed)


Women's Isaac Details

Women's Isaac

specifications

  • * Weight: 7.8oz
  • * Drop: 8.0mm
  • * Support: Neutral
  • * Certified Vegan
  • * Sustainably Constructed
Women's Isaac

upper

  • * Anatomically designed air-mesh
  • * Plush, seamless anti-friction linings
  • * Perforated tongue for breathability 
  • * Multi-positional lacing system 
  • * Upper constructed of 100% recycled materials
Women's Isaac

sole technology

  • * Energized NRG+™ Foam
  • * XPS+ Pebax® plating system
  • * Split-lug Action Reaction Technology™
  • * Hytrel® foam footbed
Learn More About Newton's Technology

What Makes Newton Unique?


Women's Isaac Side View

More Foam, More Fun

Our first super cushion shoe combines next gen NRG+™ and Hytrel® foams to minimize impact while the sculpted rocker geometry is designed to amplify forward momentum and minimize weight. The result? An amazingly soft but versatile shoe that feels just as great logging long miles as it does wearing around casually.

Women's Isaac Bottom View

Next Level Technology

The new Split-Lug Action Reaction Technology™ is designed to maximize rebound for a smoother, more energetic ride. Equipped with 8 independent flex lugs that compress and spring back like a trampoline, they reduce impact and return energy with each stride and work in harmony with the XPS+ Peebax plate to keep you stable and in total control.

Women's Isaac

Crafted For Comfort

The Adaptive-Fit seamless air mesh molds to the shape of your foot and lets air flow freely; while features like a non-friction lining and multi-positional lacing system provide the security and comfort that makes it feel like it was built just for you.

Women's Isaac
Women's Isaac

What Our Runners Think

Customer Reviews

Based on 10 reviews
90%
(9)
0%
(0)
10%
(1)
0%
(0)
0%
(0)
80.0
C
Carol Herczeg
Colors

Hello. I love newton running shoes! The structure of the shoes and the company are THE BEST! I am 60 years old and have been running since I was 12 years old. I owe sustained recovery from nagging injuries to Newton! I would love more options in more basic colors (black, white). The bright colors won’t stop me from buying the shoes…..even if the colors are outside my comfort zone.

M
M.P.
Favorite shoe, hands down

These new Isaacs are the best shoe I have worn. They’ve been great for distance, short jogs, walks, and speed workouts.

I cannot rave about these enough. I love the changes and will be stocking up on multiple pairs to rotate.

J
Jill S
Love them!

I wore Lady Isaac's for several years until they became unavailable. I was thrilled to try the new Women's Isaacs and they do not disappoint. They're so comfortable and plush -- and the color's great, too. Love them (even more than my old Lady Isaacs)!

c
carol c. NYC
I miss the old version of the Isaac

Newton’s Lady Isaacs have been my go to shoe for every day runs and races since they came on the market. I loved them and often bought 3-4 pairs a year. They made me feel like I could fly despite the need to a solidly supportive shoe.

When the new redesigned Isaacs came out I immediately bought a pair despite the fact that they weren’t sold as stability style. Sadly, they were a big let down.

On a recent longer run, 11 miles, my ankle started hurting and the forefoot felt weirdly narrow on the sole of the shoe. Also it feels both slightly too big and too small at the same time.

Because I love this brand and don’t want to return I’m keeping them but will only do walking, treadmill or very short runs in them. Mourning the loss of my fave style and brand.

Hopefully a re-redesign will come out soon.

B
BARBARA ELLIAS

MAssive improvement. ! these are my favorite shoes of all time ! I’ve used only newtons for years but hoped for a more arch supportive but cushioned shoe … this is it! The most comfy but perfect shoe !!!

12

Customer Reviews

Based on 10 reviews
90%
(9)
0%
(0)
10%
(1)
0%
(0)
0%
(0)
80.0
C
Carol Herczeg
Colors

Hello. I love newton running shoes! The structure of the shoes and the company are THE BEST! I am 60 years old and have been running since I was 12 years old. I owe sustained recovery from nagging injuries to Newton! I would love more options in more basic colors (black, white). The bright colors won’t stop me from buying the shoes…..even if the colors are outside my comfort zone.

M
M.P.
Favorite shoe, hands down

These new Isaacs are the best shoe I have worn. They’ve been great for distance, short jogs, walks, and speed workouts.

I cannot rave about these enough. I love the changes and will be stocking up on multiple pairs to rotate.

J
Jill S
Love them!

I wore Lady Isaac's for several years until they became unavailable. I was thrilled to try the new Women's Isaacs and they do not disappoint. They're so comfortable and plush -- and the color's great, too. Love them (even more than my old Lady Isaacs)!

c
carol c. NYC
I miss the old version of the Isaac

Newton’s Lady Isaacs have been my go to shoe for every day runs and races since they came on the market. I loved them and often bought 3-4 pairs a year. They made me feel like I could fly despite the need to a solidly supportive shoe.

When the new redesigned Isaacs came out I immediately bought a pair despite the fact that they weren’t sold as stability style. Sadly, they were a big let down.

On a recent longer run, 11 miles, my ankle started hurting and the forefoot felt weirdly narrow on the sole of the shoe. Also it feels both slightly too big and too small at the same time.

Because I love this brand and don’t want to return I’m keeping them but will only do walking, treadmill or very short runs in them. Mourning the loss of my fave style and brand.

Hopefully a re-redesign will come out soon.

B
BARBARA ELLIAS

MAssive improvement. ! these are my favorite shoes of all time ! I’ve used only newtons for years but hoped for a more arch supportive but cushioned shoe … this is it! The most comfy but perfect shoe !!!

12