
Lady Isaac Details

specifications
- Weight (oz): 9.1
- Drop: 3
- Support: Stability

upper
- Light and Airy
- Durable, Comfortable and Breathable
- Performance Lace and Tongue System
- Metatarsal Stretch Panel
- Foot-hugging supportive overlays

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?

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.

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.

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
Great comfortable shoe for running or walking!!! Plenty of toe room
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!
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.
Not had long but they do run tight as noted and I do feel they are comfortable shoes for walking!
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. :)
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Great comfortable shoe for running or walking!!! Plenty of toe room
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!
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.
Not had long but they do run tight as noted and I do feel they are comfortable shoes for walking!
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. :)