I only used this bag once. It still smells new. I haven’t had time for tri’s in a few years and it is just taking up space. The link below is a slightly different bag (different colors than mine and slightly different build), but it will give you an idea about the build and features. This is the last tri bag you will ever need and it is super comfy. The pics attached are of the actual bag. It’s big enough to hold an aero helmet, wetsuit (it has a separate compartment to keep everything dry), and everything else you could possibly image. Tons of specialized pockets for everything you can think of. AND it is super duper light.
You can see photos of the actual bag here: https://post.craigslist.org/manage/2700958034/gc73r
You can see more detailed photos & features description here: http://zootsports.com/spring2010/product/tri-bag?category=mens%2Fbags