blueblack
  • blueblack
  • blueblack
  • blueblack
  • blueblack
  • blueblack
  • blueblack

Men's Isaac S

$150.00

Built for Maximum Support

The Isaac S 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.

Sir Isaac S 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?

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

Customer Reviews

Based on 17 reviews
100%
(17)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
P
P.A.
Best shoe ever worn

Neutral stance, very stable, and REALLY helps keep my ankle and knees in perfect alignment. I literally bought 3 pairs at once to stock up.

M
Merritt Ringer
Sir Issac

I love this shoe. It is the third pair I've purchased. I've had a bit of trouble with neuroma and plantar fasciitis but never with these shoes and I use them for lots of very vigorous hiking and the gym. An A+ product from people who seem to care about their work and their customers.

M
Marcus W
Glad to have them again!

Just bought another pair of Isaac S running shoes. Tried another brand of shoe and ended up with pains I’ve never had before. Glad the Newton Running stayed in business to keep making the shoes that work for me!!! Thank you!!!

D
Doug L
These shoes saved my running!

I battled plantar fasciitis for 7 years, in large part because I am a larger runner and a mid- to fore-foot striker. I finally found a physical therapist who could help me with the PF, and he recommended the Newton Isaac S. I’ve been running on these shoes ever since - and my PF nemesis hasn’t reappeared. Thank you for sticking with this shoe - it has been a savior for me!!

w
william
best for me

my favorite running shoe. wide toe box, narrow heel, lots of stability.

123

Customer Reviews

Based on 17 reviews
100%
(17)
0%
(0)
0%
(0)
0%
(0)
0%
(0)
P
P.A.
Best shoe ever worn

Neutral stance, very stable, and REALLY helps keep my ankle and knees in perfect alignment. I literally bought 3 pairs at once to stock up.

M
Merritt Ringer
Sir Issac

I love this shoe. It is the third pair I've purchased. I've had a bit of trouble with neuroma and plantar fasciitis but never with these shoes and I use them for lots of very vigorous hiking and the gym. An A+ product from people who seem to care about their work and their customers.

M
Marcus W
Glad to have them again!

Just bought another pair of Isaac S running shoes. Tried another brand of shoe and ended up with pains I’ve never had before. Glad the Newton Running stayed in business to keep making the shoes that work for me!!! Thank you!!!

D
Doug L
These shoes saved my running!

I battled plantar fasciitis for 7 years, in large part because I am a larger runner and a mid- to fore-foot striker. I finally found a physical therapist who could help me with the PF, and he recommended the Newton Isaac S. I’ve been running on these shoes ever since - and my PF nemesis hasn’t reappeared. Thank you for sticking with this shoe - it has been a savior for me!!

w
william
best for me

my favorite running shoe. wide toe box, narrow heel, lots of stability.

123