Sun Mountain E-3.5 Stand Bag Review: The Do-Everything Bag?

The new Sun Mountain E-3.5 is $300, and if you walk some rounds and ride the rest, it’s the bag in the 2027 lineup I’d look at first.

Is the Sun Mountain E-3.5 Stand Bag worth buying?

Here’s the problem with buying a Sun Mountain bag right now. Go to their site and you’ll find two bags called the E-3.5. Same 8.5-inch top, same 11 pockets. One is $300, and the other is $232.

On October 1, Sun Mountain renamed its Eclipse stand bags the E-Series. This review covers the new 2027 E-3.5. The old 2026 Eclipse E-3.5 didn’t go away, it just got marked down. So if you read about an “Eclipse E-3.5,” or click a link that says it, that’s the older bag, with a different strap and a rain hood in the box. If you’re looking at the older generation’s E-2.5 instead, my Sun Mountain Eclipse 2.5 review covers that one.

The new E-3.5 sits in the middle of a three-bag lineup. The Sun Mountain E-2.5 is the walker’s bag. The Sun Mountain E-4.5 VLO is built for a push cart or a riding cart. The E-3.5 is the one in between, the bag for the golfer who walks Saturday and rides Sunday. So let’s get into what you actually get for $300, and when the old Eclipse is the better deal.

Quick Overview

• It’s $300 direct from Sun Mountain, $10 more than the E-2.5 and $15 less than the E-4.5 VLO.
• The 8.5-inch top has four full-length dividers, and it’s the widest four-way in the new lineup.
• There are 11 pockets, including a magnetic rangefinder pocket and a cooler-lined bottle holder.
• Sun Mountain lists it at 5.0 lb, right between the 4.4 lb E-2.5 and the 5.9 lb E-4.5 VLO.
• It comes in 11 colors, with free shipping over $150 and free US returns direct from Sun Mountain.

Sun Mountain E-3.5 Stand Bag Specs

Specification	2027 Sun Mountain E-3.5 (this review)	2026 Sun Mountain Eclipse E-3.5 (older bag)
Price (Sun Mountain direct, Nov 2, 2026)	$300	$232 (was $290)
Model year	2027 E-Series, launched October 2026	2026 Eclipse, still sold at a discount
Listed weight	5.0 lb	4.8 lb
Top	8.5 in, 4-way	8.5 in, 4-way
Dividers	4, full-length	Not specified
Pockets	11	11
Listed capacity	27.4 L	21.8 L
Strap	Ergonomic Dual Strap System	X-Fit dual strap
Stand	Internal compression bottom	Internal compression bottom
Shell	300D polyester	Not specified
Pocket lining	Snow-fur (rangefinder and valuables)	Velour (rangefinder)
Drink holder	Cooler-lined bottle holder	Insulated drink sleeve
Ball pocket	Removable, customizable face	Not specified
Rain hood	Not listed	Included
VLO cart-fit features	No (E-4.5 VLO only)	No
Colors	11 listed, 10 in stock	Not specified
Warranty	Not stated on the product page	Not specified

The 8.5-Inch Top Is Why You Pick It Over the E-2.5

Start with the top, because that’s the biggest difference between the E-3.5 and the bag right below it.

The E-2.5 has a 7.75-inch 4-way top. The E-3.5 goes to 8.5. That’s three-quarters of an inch wider, with the same four full-length dividers. And when you’re putting 14 clubs into four sections, that extra width is where you feel it. Your grips get a little more breathing room, and pulling one club out is less likely to drag two more with it.

Now, four-ways have one problem. Your clubs share space. I said it in my stand bag roundup video: one round with every club in its own slot, and you’ll go back to a four-way feeling like you’re digging through a junk drawer. That’s true here too. If that bugs you, the E-4.5 VLO’s 14-way top is the fix. But if you like a four-way, this is the roomiest one Sun Mountain makes in the new lineup.

So it comes down to this. For $10 more and 0.6 lb, you get the wider top, two more pockets and 2.8 more liters of room. If you walk every single round with a working set, the E-2.5 is lighter and I’d take it. If you carry a full set and a full day of stuff, that $10 is money well spent.

Eleven Pockets Is Room for a Long Day on the Course

This is where the E-3.5 earns the do-everything label. You get 11 pockets. That’s two up on the E-2.5, and it matches the E-4.5 VLO.

And they’re not pockets just to hit a number. The rangefinder pocket is magnetic and lined with snow-fur, so you pull the rangefinder out, drop it back in, and the pocket closes on its own. No zipper on every hole. There’s a snow-fur-lined valuables pocket for your phone and wallet, plus an internal key clip so your keys don’t end up at the bottom of the bag.

Then there’s the cooler-lined bottle holder, so the drink you packed is still cold on the back nine. You also get stretch pockets on the inside, a glove attachment, and a ball pocket with a removable face you can customize.

Sun Mountain lists the capacity at 27.4 liters. The old Eclipse listed 21.8, with the same top and the same pocket count. On paper, that’s room for a jacket, an extra layer, a dozen balls and everything else you’d want for 18 holes on a cold morning that turns hot by noon.

It Carries Like a Stand Bag, but It’s Not a Cart Bag

The E-3.5 keeps Sun Mountain’s internal compression bottom. Set the bag down and the base hinges to kick the legs out. It’s the same base the Eclipse used, so you’re not giving up anything the old bag did well.

The strap is new. Sun Mountain calls it the “all-new Ergonomic Dual Strap System,” and it replaces the X-Fit strap from the Eclipse. It’s a dual strap, so the weight sits on both shoulders, which is what you want when you’re walking 18.

Now, here’s where a lot of golfers are going to get it wrong. Sun Mountain’s tagline for this bag is “Go Anywhere,” and yes, you can strap it to a push cart or put it on a riding cart. But it doesn’t have the VLO cart features. You only get those with the E-4.5 VLO, the bag Sun Mountain builds for carts.

So if you push or ride most of your rounds, spend the extra $15 on the E-4.5 VLO. You get a 14-way top with 14 full-length dividers, and you carry 0.9 lb more. If you still walk a good chunk of your rounds, keep the 0.9 lb and get the E-3.5.

And don’t read “Go Anywhere” as a travel bag. There’s no travel feature on the product page. If you’re flying with it, you still need a travel cover, and my ClubGlider3 travel bag review covers the one I’d pack it in.

At $300, the Old Eclipse E-3.5 Is the Better Deal for a Lot of Golfers

Here’s the deal. Sun Mountain still sells the Eclipse E-3.5, and right now it’s $232 direct. The new one is $300, so that’s a $68 difference.

So what does the $68 get you? More listed room, 27.4 liters against 21.8, plus the new strap, snow-fur linings instead of velour, and a cooler-lined bottle holder instead of a drink sleeve.

What doesn’t change? The top size, the 11 pockets and the internal compression bottom are all the same. And the Eclipse comes with a rain hood, while the new product page doesn’t list one.

And to be fair to Sun Mountain, $300 isn’t a crazy price. The Eclipse E-3.5 used to be $290, so the new bag is only $10 over what the old one cost at full price. The old one is just on clearance.

So if you want the extra room and the newest version, buy the new one. If you just want a great middle-weight stand bag for less money, grab the Eclipse E-3.5 at $232 before the clearance price is gone. Buy it direct, too. Some shops still list it at $290, and there’s no reason to pay that. And if you’re shopping outside Sun Mountain, the PING Hoofer is the stand bag everything else gets measured against.

What I Don’t Love

The new parts are the problem. You’re paying for them on Sun Mountain’s word.

The strap is the biggest change, and Sun Mountain gives you a name and that’s it. Nothing on how it’s built or what makes it better than X-Fit. The 5.0 lb weight and the 27.4 liters are Sun Mountain’s numbers, too. When I checked in early November, its own product page had zero reviews.

Then there’s what’s missing. No rain hood is listed, and the page doesn’t say how long the warranty is. And there’s no waterproof claim, so if you play in a lot of rain, look at Sun Mountain’s H2NO bags instead.

None of that makes it a bad bag. It’s built on the same base and the same layout as the Eclipse. But at $68 over the Eclipse, I’d want to know what that strap is doing before I paid for it. The good news is US returns are free, so if the strap doesn’t work for you, it goes back.

Who It’s For

Buy it if:

• You walk some rounds and ride others, and you want one bag for both.
• You carry a full set plus layers, a rangefinder and a cold drink.
• You like a four-way top and want the widest one in Sun Mountain’s new lineup.
• You want the newest version, and the extra room is worth $68 to you.

Skip it if:

• You walk every round and count ounces. Get the $290 E-2.5.
• You push or ride most rounds, or you want a slot for every club. Get the $315 E-4.5 VLO.
• You just want the best deal. The Eclipse E-3.5 is $232 direct, and it comes with a rain hood.

Frequently Asked Questions

Final Thoughts: Sun Mountain E-3.5 Stand Bag Review

If you split your rounds between walking and riding, and you carry a lot of stuff, the E-3.5 is my pick from the new E-Series. It’s $300 direct from Sun Mountain, with free US returns. If you don’t need the extra room, save the $68 and get the Eclipse E-3.5 at $232. And if you want to see how it stacks up against everything else, my best stand bags list is the place to start.

About the author

Paul Liberatore

Paul Liberatore is the founder of Golfers Authority and a former four-year golf gear contributor to Sports Illustrated. He tests golf equipment hands-on to help golfers make better buying decisions.

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