Foam vs Fleece vs Firm Stabiliser - What's the Difference?

The stabiliser you choose can completely change the look and feel of a finished bag. Even when two products seem to offer a similar amount of support, they can behave very differently once they're combined with your fabric.

I definitely have a favourite when it comes to bag making: for most bags, foam stabiliser is my first choice.

That doesn't mean foam is right for absolutely everything, though. Here's how I find the three main options differ and when I would - and wouldn't - use each one.

Foam stabiliser - my favourite for most bags

For me, foam is the uncrowned queen of bag stabilisers. 😊

It gives a bag beautiful shape and structure while still remaining soft and flexible. With the right exterior fabrics and interfacing, I find it produces a lovely, professional-looking result without making the bag feel rigid.

It's also wonderfully forgiving to work with. Foam is generally easy to sew on a domestic sewing machine, it bends and compresses as you're manoeuvring the bag under the presser foot, and it's much easier to turn through an opening than a very firm stabiliser.

That last point can be particularly helpful if you like me have limited hand strength or simply don't fancy wrestling your sewing project into submission!

I use foam as the main stabiliser in many of my Pink Pony Design patterns for exactly these reasons.

My personal favourite is ByAnnie's Soft & Stable, but there are several similar bag-making foams available, including Bosal In-R-Form, Pellon Flex-Foam and Vilene Style-Vil.

Fleece, fusible fleece or batting

I'll admit that fleece and batting are very rarely my first choice for bag making. This includes fusible fleece - while the fusible backing can make it convenient to work with, I still find that the finished result has the same general softness and lack of structure that makes me prefer foam for most bags.

Fleece and batting provide softness and some body, but they don't give the same structure and smooth finish that I find I can achieve with foam. Depending on the fabric and construction, they can leave a finished bag looking softer and more quilted, rather than giving it the crisp, structured appearance I generally want from my designs.

That isn't necessarily a bad thing - if that's the look you're trying to achieve.

Fleece or batting can work perfectly well for very small bags, pouches and makeup cases where a lot of structure isn't needed. They can also be useful when you deliberately want a softer or more quilted finish.

Even for those projects, though, I personally tend to reach for foam instead because I prefer the finished result.

So while fleece - fusible or otherwise - and batting certainly can be used in bag making, they aren't something I generally recommend as a direct replacement for foam if you want the bag to look and behave like the original design.

Firm and heavy stabilisers

At the other end of the spectrum are heavy stabilisers such as Fast2Fuse Heavy, Decovil Heavy and Pellon Peltex.

These can create absolutely beautiful, highly structured bags. When I want a design to have a very crisp, firm silhouette, a heavy stabiliser can give me a result that foam simply can't reproduce, they're used in my patterns such as the Bergen Bag and Stockholm Bag.

The trade-off is that they're generally more demanding to work with.

A heavily stabilised bag can be harder to manoeuvre through a domestic sewing machine and considerably more difficult to turn. Firm stabilisers can also crease during turning, and once a heavy stabiliser has developed a pronounced crease, getting that perfectly smooth finish back can sometimes be a battle.

That doesn't mean I avoid them - far from it. With the right pattern and construction methods, I think heavy stabilisers are fantastic. They're simply not my default choice for every bag.

I also wouldn't automatically replace foam with a heavy stabiliser just because you want a firmer finished bag. Areas that need to bend or flex - particularly flaps and curved sections - may behave much better with foam.

So which should I choose?

If you're making one of my patterns, my first recommendation is always to start with the type of stabiliser specified in the pattern. I've chosen it based on the firmness, shape, construction and intended feel of that particular bag.

If you're choosing for your own project, I generally think of them this way:

Foam: My all-round favourite. Great structure while remaining flexible, easy to work with and suitable for most bags.

Fleece/batting: Soft with less structure. Useful for small pouches, makeup bags or when you deliberately want a softer or quilted look, but generally not my choice for a structured handbag.

Heavy stabiliser: Very firm and structured. Fantastic when the design calls for it, but more demanding to sew and turn and not ideal for every construction method.

There isn't one stabiliser that's best for every single bag - but if you asked me which one I couldn't live without, foam would win every time. 😊