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G4 PRO Powerlock Boot - Men's

3.9375 out of 5 stars
16 Reviews


Size Chart


Why We Like The Simms G4 PRO Powerlock Boot

The new G4 PRO Powerlock Boot from Simms keeps our feet dry and comfortable as we spend the day waiting for the fish to bite. The waterproof synthetic leather and mesh upper offer long-lasting durability, while the partial neoprene lining offers comfort and an easy on and off. On the Vibram Idogrip outsole, we have the built-in Powerlock system, offering quick and customizable traction adjustment between TPR and aluminum cleats.


  • An advanced wading boot for serious river fishers
  • Waterproof upper construction features synthetic leather and mesh
  • Partial neoprene lining offers an easy and comfortable on/off
  • Vibram Idrogrip outsole is durable and extra grippy
  • Powerlock cleat system allows for on-the-fly traction customization
  • Dual-density EVA midsole enhances walking comfort
  • Includes two sets of cleats (TPU, aluminum) and a cleat wrench
  • Item #SMMF0GS
Upper Material
waterproof synthetic leather, waterproof synthetic mesh
partial neoprene
dual-density EVA
Vibram Idrogrip outsole with Powerlock system
fly fishing, river fishing

Overall Rating

4 based on 16 ratings

Review Summary

1 Stars - 2 reviews
2 Stars - 1 reviews
3 Stars - 1 reviews
4 Stars - 4 reviews
5 Stars - 8 reviews

What do you think about this product?


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3 out of 5 stars

December 17, 2023

I like the boots however the stud tool is flimsy and broke now what to do


Originally reviewed on

5 out of 5 stars

October 31, 2023

I am very pleased and love the shoes that I got I’ve been fishing three times already and they are amazing. I do lots of fishing at Pulaski, New York, and the grip that I get from these shoes are amazing. I recommend to anybody about the shoes again very very happy with this.


Originally reviewed on

5 out of 5 stars

September 30, 2023

These are great boots they provided excellent support the disc system is very easy to change out and lock in very secure I have put these to a hard test and I can't say enough about this product I would highly recommend for anyone that spends a lot of time on the water and wants quality gear


Originally reviewed on

2 out of 5 stars

September 26, 2023

Boots are the most comfortable ones I’ve owned. However, every time I have taken them out with the aluminum pucks I lose at least 1. The tpu cleats do good enough for me, just really disappointed that a boot in this price range has that big of a problem


Originally reviewed on

4 out of 5 stars

September 20, 2023

Comfortable, light weight, and sturdy. Felt good on my feet for extended hours of fishing.

user image

Originally reviewed on

1 out of 5 stars

August 29, 2023

Not impressed with these boots

I had five of the power lock aluminum pucks come off, while I was crossing rocks and threw me off, balance, resulting in falls, or near falls over the course of three hours of fishing. Fortunately, I brought my other felt bottom boots, and was able to continue fishing. I found all of the disks at the riverside and promptly returned these to the retailer that I purchased them from. Yes, I watched the video Simms provided before I installed the power locks and installed them with the fly shop associates help. While returning these boots, another shopper said that their friend bought the same boots, and had to use Loctite to keep the pucks in. I have had numerous golf shoes and never had this problem . I am very familiar with these types of devices and did not over tighten them. When the pucks dislodge These shoes could be dangerous if it resulted in a fall. The area I was fishing in had jagged rocks and boulders that have been blasted out of the mountain wall and put down for a roadway at the rivers edge. Additionally, as the boots got wet, they seem to get very loose in the heel and ankle area. I have other Simms products and I’m very happy, but these boots did not meet the mark. I think the premise of a quickly changing traction system was a great idea, but it is not working for me.


Originally reviewed on

4 out of 5 stars

August 16, 2023

Air vents

Comfortable boots but waterproof is missed with the cool air vents I missed seeing.


Originally reviewed on

1 out of 5 stars

August 1, 2023

Way to stiff to walk in.

So stiff It feels like a ski boot. I returned them.


Originally reviewed on

4 out of 5 stars

July 10, 2023

Dislike the lacing system

I really like this boot: true to size, comfortable, durable, and the Powerlock system is really grippy on slick river bottoms. But I couldn't give it five stars because of the lacing system. That curved lace holder (the first one after the conventional cloth lace eyelets that's shaped like a smiley face) is an invention of the devil! It's hard to get them to accept the laces and at the end of the day, the laces get stuck in there and make it nearly impossible to get them out. I've had to skip them altogether when lacing up.


Originally reviewed on

5 out of 5 stars

June 25, 2023

Strong and Stable!

I have just transitioned from a hiker style wading boot to the Powerlocks and I can tell you from a stability/traction standpoint there is no comparison. I am in my early 60’s with bad knees and so my appetite for heavy wading has diminished, but my confidence level has soared over the last 2 weeks as I have worn the Powerlocks! They will take a bit of time to get used to as they are very firm and higher than my old boots, but it is certainly worth the effort. A couple of notes: make sure you don’t overtighten the studs as they will strip. There is a definite “locking” feel when they are tightened and so don’t go beyond that. Connected with my previous thought, I wouldn’t initiate them on a big trip of some kind because they seem like they will take some hours to get used to. Thanks Simms!!


Originally reviewed on