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G4 Pro™ Jacket

ITEM # PG-10670


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

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The ultimate wading jacket
Dress for absolute angling success in Simms’ versatile, stormproof G4 Pro™ Jacket. Featuring updated GORE-TEX® PRO SHELL fabric, new G4s are 15% lighter than previous incarnations, while boasting an increase in bomber abrasion resistance and tear strength from top to bottom. Slip your hands into the drink, caress the tail of a two-footer, and keep inner sleeves dry thanks to the highly water-resistant Dry Cuff™ system. And source savvy architectural accents via nine storage pockets, including fly-box friendly bellowed and zippered chest options, two tippet pockets, a convenient sleeve stash, internal woven stretch storage, and one heaping back compartment—big enough to swallow your lunch, and then some. Welcome to the unmatched G4 Pro™.

Read about the Evolution of the G4 Pro™ Jacket

See the VIDEO tab for more on the G4 Pro™ Jacket

View Product Features

Terrace Chrome


  • Updated GORE-TEX® PRO shell fabric: 15% lighter weight than the previous G4 Pro™ Jacket, with improved abrasion resistance and tear strength
  • 9 storage pockets: 2 bellowed chest pockets, 2 zippered chest pockets, 2 tippet pockets, 1 sleeve pocket, 1 internal stretch woven pocket, and 1 large back storage pocket
  • Highly water-resistant Dry Cuff™ design keeps water out of the sleeve when tailing fish or casting in the rain
FABRIC TECH: : 3-layer GORE-TEX® Pro Shell fabric; 100% ripstop nylon face
APPROX. WEIGHT: 23 oz/660g

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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


G Series in Mongolia

Forget the Forecast -
the Next Evolution in G4 is Here

Embrace Elements

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

11 Review(s)

Items 1 to 10 of 11 total

Outstanding product and Customer Service Review by Fish Addict

Fish Addict 8/23/2015

Use this thing in Alaska as a summer guide on the Naknek. Kept me warm and dry. Used it daily and very happy. If/when this one wears out will buy another. Has my full recommendation. One tip is to consider buying one size larger than usual. You will want a loose fit for layers under and throwing a rod. Get over the price and buy it.

(Posted on 8/23/2015)

Only two issues with the jacket Review by Panasonic

Panasonic 8/6/2015

First, three pockets on top of each other, makes them bulk up when all three are full.
Second, the flaps of the top pockets have 4 velcro pieces, that make them very difficult to open. I can't see those flaps opening if they only had one piece of velcro.

(Posted on 8/6/2015)

Incredible jacket Review by Checkmate 46

Checkmate 46 7/24/2015

Bought this jacket for a trip to northern Canada to fish in rain and chilly weather for big pike. I was concerned about the price, but once I realized I was the only one dry and warm I realized that I would have paid double for it. This jacket is engineered in every respect. There is nothing on it or not on it that hasn't been carefully thought through.

You can find cheaper jackets. But they won't be as light weight, as comfortable, as impervious to the weather, as easy to load up with gear and stay organized and as all round quality as this one.

If you don't believe that, find someone who has one. Borrow it, get in a boat and go 35 mph into the wind on a 42 F day with a driving rain coming down on you. I did. As soon as you think, "I'm warm and I'm dry" you will know you're going to have a great day fishing and you're going to be glad you had the G4 Pro jacket.

Then all you have to do is convince all your wet and cold buddies not to go back to the cabin.

(Posted on 7/24/2015)

Colorway Review by Theo

Theo 5/3/2015

Could you make a dark gunmetal camo one? Would be an awesome addition and i would definitely want one!

(Posted on 5/3/2015)

Good qaulity, lacks loops for attaching Boga Grip or stringer. Review by Cookie

Cookie 2/13/2015

The overall quality of material and workmanship appears to be excellent. It would be nice if there were a couple of loops on the jacket to attach a Boga Grip or stringer. There really is no where on the exterior of the jacket to attach anything. Maybe we'll see it on the next version.

(Posted on 2/13/2015)

Lives up to the hype Review by Pyramid lake truckee river NV

Pyramid lake truckee river NV 1/12/2015

I purchased this coat for the water tight wrist cuffs and something to save me from the elements. As far as I'm concerned this jacket paid for itself on the first outing. I landed a 15 lb cutthroat out from pyramid lake NV on a windy and cold day. While landing and releasing the cutt, I submerged my arms multiple times. At day's end my inner layers where dry and I was warm... A very small amount of water did get through, a very very small amount. I don't know how many winter days I called it quit because of getting my arms wet. Kept the wind and cold out. This jacket is top of the line... A win win. Small price to pay to stay dry and warm. Wish I could of had this jackets years ago. Nut up and get it.

(Posted on 1/12/2015)

Best so far Review by Speyskunk

Speyskunk 1/10/2015

In over forty years of professional fly angling i believe this to be the pick of the litter of wading / rain jackets.
Beyond all the pockets and more zippers than a Virginia road map, the jacket is very personable.
Meaning that un.ike most 'highly technical' jackets this G4 rain coat feels like an old friend the day You put it on.

Only oversight in design from my 30+ days in the jacket: The pockets lack drain holes.

(Posted on 1/10/2015)

Great Wading Jacket Review by Todd

Todd 11/26/2014

Bought this great jacket and it held up to all expectations.
If you get out in the elements you should own one.
Tons of storage, zippers hold up well and very comfortable.

Capt. Todd Wilson

(Posted on 11/26/2014)

Overall Review by boid12003

boid12003 11/17/2014

Simms products are the best in the fishing market, hand's down. The G4 Pro series is that continued expression of excellence. Simms prides themselves on the quality of their merchandise and they stand behind that quality every day of the week. I started owning Simms many years ago and I won't buy anything less, because anything but Simms is less than the best.

(Posted on 11/17/2014)

G4 2014 Wading jacket Review by zonker 05

zonker 05 10/28/2014

Have been using the new 2014 G4 now for a dozen trips or so and find it a great wading jacket. Great features. More than enough pockets and very user friendly. A few good natured comments on the design would be to make it a bit shorter. I like my wading jackets on the short side. Also the full neck zip is a bit tight when you use a neck gaiter. Other than that it is bomb proof and I consider it an essential for Michigan all season steelhead fishing.

(Posted on 10/28/2014)

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