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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

Sustainably Constructed, Certified Vegan


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


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 69 reviews
94%
(65)
4%
(3)
1%
(1)
0%
(0)
0%
(0)
J
Judy Leetz
Legacy of The Shoe

Some time ago we took our granddaughters and family to DisneyWorld. Our young granddaughter was having shoe issues and her feet hurt. I had my Newtons so we changed shoes and they magically fit just like Cinderella. So this shoe goes again to my granddaughter who now loves Newtons just like her Grammy. The shoe gives support while being light, comfortable, durable and stylish. Awesome product!

G
Gefe Pfotenhauer
Loyal Newton Customer

Absolutely love everything about my Kismet and Lady Isaac. These two running shoes are my ‘go’ too. Discovered Newton’s 12 years ago and have been a loyal customer since my discovery . I won’t try any other brands.

Keep up the amazing products.

T
Tamela Biggs

Not had long but they do run tight as noted and I do feel they are comfortable shoes for walking!

E
Emily M
Comfy

I have not used them much yet since I am saving them for a bit later still but I did walk around in them for a minute or and they felt awesome!! Seems they are more 'cushiony' than my last ones. Love the aqua color too. :)

J
Jeanne
Great Shoes but Expensive

I rarely if ever give a 5 star review to anything as I think everything is too expensive. That being said however, I really like these shoes. I am 60 years old, and used to have trouble with my knees. I no longer have any problems, and the only thing I changed was my shoes. I have had several pair of Newtons.

123

Customer Reviews

Based on 69 reviews
94%
(65)
4%
(3)
1%
(1)
0%
(0)
0%
(0)
J
Judy Leetz
Legacy of The Shoe

Some time ago we took our granddaughters and family to DisneyWorld. Our young granddaughter was having shoe issues and her feet hurt. I had my Newtons so we changed shoes and they magically fit just like Cinderella. So this shoe goes again to my granddaughter who now loves Newtons just like her Grammy. The shoe gives support while being light, comfortable, durable and stylish. Awesome product!

G
Gefe Pfotenhauer
Loyal Newton Customer

Absolutely love everything about my Kismet and Lady Isaac. These two running shoes are my ‘go’ too. Discovered Newton’s 12 years ago and have been a loyal customer since my discovery . I won’t try any other brands.

Keep up the amazing products.

T
Tamela Biggs

Not had long but they do run tight as noted and I do feel they are comfortable shoes for walking!

E
Emily M
Comfy

I have not used them much yet since I am saving them for a bit later still but I did walk around in them for a minute or and they felt awesome!! Seems they are more 'cushiony' than my last ones. Love the aqua color too. :)

J
Jeanne
Great Shoes but Expensive

I rarely if ever give a 5 star review to anything as I think everything is too expensive. That being said however, I really like these shoes. I am 60 years old, and used to have trouble with my knees. I no longer have any problems, and the only thing I changed was my shoes. I have had several pair of Newtons.

123