G4 Pro™ Jacket



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G4 Pro Jacket - Gunmetal


Guides Day Off is just another day on around these parts. It means time to prototype new patterns and techniques, and to source and mark beasts for future reference. Because working-class anglers rarely get a breather, Simms built its don’t-quit jacket for the extreme weather grind. The stormproof G4 Pro™ is cutting-edge equipped to keep you dry, warm, and comfortable via 3-layer GORE -TEX® Pro Shell fabric, and it features an intuitive array of fishing-first elements at your finger tips. Jackets are kitted with 7 storage pockets; 2 bellowed chest pockets, 2 zippered chest pockets, 2 zippered tippet pockets and 1 large back pocket. Quick drying microfleece-lined hand warmer keep your digits frost-free in subzero temps, while water-resistant pit zips allow you to air out the funk when the fishing heats up. Simms G4 PRO™. Expert abused. Angling-addict approved.


  • Full-length YKK® VT9 AquaGuard® VISLON® water-resistant center-front zipper with zipper flap for additional protection
  • Heavier nylon fabric in shoulders for additional durability and lighter nylon fabric in body for enhanced packability
  • Seven storage pockets including two bellowed chest pockets, two zippered chest pockets, two zippered Tippet pockets and one large capacity back pocket
  • Quick-drying, microfleece-lined hand warmer pockets with zipper closure
  • The only Simms rain jacket featuring water-resistant pit zips
  • Adjustable storm hood, adjustable cuffs and adjustable shock cord hem
  • Two patented built-in retractors
  • 3-layer GORE-TEX® Pro Shell fabric; 100% Nylon face
  • Approximate weight: 33 oz
Simms G4 Pro Fishing Jacket


Size Chart

Men's Outerwear Top Size Chart

Men's Sizes Chest* Neck*Sleeve*
S 36" - 38" 14.5" - 15" 33" - 34"
M 39" - 41" 15.5" - 16" 34" - 35"
L 42" - 45" 16.5" - 17" 35" - 36"
XL 46" - 48" 17.5" - 18" 36" - 37"
XXL 49" - 51" 18.5" - 19" 37" - 38"

* These are body measurements


G4 Pro™ Jacket

Why Outerwear?

GORE-TEX® Technology and Simms Gear

Product Care

GORE-TEX® Outerwear Care:

Cleaning your GORE-TEX® garments regularly will extend the life of the product. It will also keep them breathable as dirt and oil can clog the GORE-TEX® membrane over time.

It is critical to wash jackets. Natural oils can damage the GORE-TEX® tape and adhesives causing a peeling effect.

Machine wash warm. Do not use fabric softener or bleach.

Remember to zip all pockets and close all Velcro cuffs before washing to prevent any damage caused by the machine.

Tumble dry on warm setting making sure not to use a high heat setting. Drying on warm will actually reactivate the DWR coating.



  • GORE-TEX® PRO SHELL outerwear is waterproof, exceptionally lightweight and offers the ultimate in breathability, durability and extended comfort. Constructed with a woven backer, GORE-TEX® Pro Shell garments slide easily over other layers and offer exceptional tear strength and internal abrasion-resistance.

  • The AquaGuard® VISLON® zipper is a revolutionary new design from the global leader in containment closures. The AquaGuard® VISLON® zipper's new tooth design provides enhanced fluid repellency vs. coil or standard individual element closures, while increasing the number of design and color options for your application.


Customer Reviews

33 Review(s)

Items 11 to 20 of 33 total

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G-4 Pro Jacket Review by me blake
Replaced a Cloudveil jacket that is no longer made. Can't buy Pategonia since they screwed all the flyfishing reps... Works perfect in those downpours we've had since October. Way more confortable then my old rain jacket, plus the pit zips don't leak. Even works for mushroom hunting when the river is blown out. Great fit, totally dry, and just in time for the moonsoon season....

(Posted on 11/8/12)

Durable and Dry Review by Ryan
I've used this jacket for years guiding in Alaska, and it will keep you dry! When you are in a place like AK, going to be on the water for 10hr days while its raining, this will keep you as dry as can be. My only complaint would be that sometimes while tying a fly on or what not, I'll put the rod in my pit and the line will get stuck on the pit zips. My next jacket won't have pit zips.

(Posted on 8/9/12)

Best Rain Jacket Ever Review by The Reptile
I used my G4 first in Alaska and it made my week. I love fishing in the rain and cold with this jacket. Home in Oregon swinging flies in bad weather is no problem with this jacket. Freezing cold - just cinch up the waste and wrist and you are like toast - dry and warm. Simms did a greatd job on this jacket. Best Rain Jacket Ever.

(Posted on 7/16/12)

Not worth the money Review by Spencer
I was relatively pleased with this jacket for the first few months I owned it, but then things began going wrong. Within the first week of ownership, one of the zingers broke, dropping my hemostats into the river. The second zinger failed a few months later. Still it was keeping me dry, but that would change once winter rolled around. By last March, having only owned the jacket for 5 months, it was already leaking pretty bad. By May, I was getting completely soaked within a few hours of a decent rain. For a $500 jacket, this is inexcusable. This Fall, in anticipation of rain, I patched some holes in the shoulders and sleeves, and reapplied the DWR coating, per Simms instructions. Doing this improved the waterproofing for a month or so, but here I am again, in Winter, with a jacket that leaks like crazy. I've probably worn this jacket 40 times in total, and it's pretty much worthless at this point. Not a good deal.

(Posted on 7/16/12)

Simply the Best! Review by Gaz
When you fish in Ireland be prepared to have all four seasons within a day! When its bad, its bad, theres nothing to stop the rain and wind rolling off the Atlantic. After 8 hours solid fishing in non stop rain and your boat partner has stopped talking because they're soaked to the skin, your still dry and smiling.

(Posted on 7/16/12)

I am JEALOUS! Review by Michael
I went drift fishing with my daughter's boyfriend and he told us to bring waterproof gear. He wore the G4 Pro Jacket and I didn't. I THOUGHT I was going to stay dry...WRONG! My rubber jacket leaked like a sieve and I was miserable for 8 hours! Took all the fun out of fishing! I can't wait to be able to buy the G4. I won't go fishing again until I get one!

(Posted on 7/16/12)

Tried, Tested, and Dry Review by David Hartlin
I guide for Atlantic Salmon in some of the most unpredictable weather anywhere...Newfoundland Can. I can honestly say that this Jacket is everything I could ever expect in a Wadding coat that WILL keep you dry!!!!!

(Posted on 7/16/12)

G4 jacket Review by thierry33
Tout simplement parfaite , je peche toute l annee en france et en espagne , quelque soit le temps et je ne suis pas particulierement tendre avec mon materiel.Cette veste est totalement etanche et le systeme de serrage aux poignees est bien fait la soie ou le bas de ligne ne s accroche pas .je vous la recommande .Juste un petit bemol le systeme de serrage en bas de la veste est a mon gout peu pratique et en wading profond elle garde l eau,pensez y Mr Simms.

[Simms translation]: Just perfect, I use all year in France and in Spain, whatever the weather (and I'm not particularly gentle) and my jacket is completely waterproof. Cuff and clamping system handles is made ​​of silk or down s line does not catch. I recommend it. just a quick clamping system bemol the bottom of the jacket is impractical for my taste and wading deep into it retains the water - think about it Mr. Simms.

(Posted on 7/16/12)

G4 Pro Jacket Review by ICHItheKILLER
Light weight and comfortable. I used my G4 Pro the other day fishing in river for steelhead, it rained on me for four hours straight with no signs of letting up, the jacket kept my face and eye glasses warm and dry, but the only problem I had was the wrist cuff letting in water, I don't think I adjusted it right from the start maybe that's why my forearms got moist. I had a Simms WaderWick Crew Top on with a different brand fleece top on underneath, I did stay warm and dry in all other parts of jacket but the wrists and forearms. I can't wait to get back out and do it again. I would buy this jacket again.

(Posted on 7/16/12)

Best ever all weather jacket Review by Michael
No matter if on a Slovenian trout river or fishing the scottish or norwegian salmon rivers and mother nature is showing her moodyness - this jacket keeps me dry and focused on the fishing. simply the best jacket i ever had - with all the small yet so important details as to cuffs, pockets etc simply designed and tailored to perfection. an outstanding jacket which is well worth the money considering the cheaper alternatives.

(Posted on 7/16/12)

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