Large size. Works well for my purpose of taking my 5 year old twins to swimming. Fits their towels, change of clothes with room to spare. Lots of pockets for goggles, swim caps and other sundries.

I was looking to replace the original TYR Alliance bag in this purchase. In settling on this back pack, I also ordered a Speedo bag, the old TYR Alliance and this the newer redesigned version. My two biggest needs in a backpack were that I wanted a wide opening and I wanted the bag to stand up without falling over. This bag provided both of those features. Compared to the Speedo bag that had a smaller capacity at 35L, smaller opening and wouldn't stand up. The newer version of the original TYR Alliance is not the quality it once was and I could see it not lasting as long as my old bag. A newer feature on this one is the top opens on the back side. That threw me off at first. Also I miss the two bigger side pockets of the older version. These got changed on the redesign. The newer 45L size though makes up for that a little bit in the extra room it gives me inside the main compartment. Also I'm a big fan of the lumbar support/laptop pad that is for both carrying a laptop and allows the bag to stand up without falling over.

Bigger than expected, I am glad I did not get an extra large, everything my son uses for his competitive swimming fits with room. The computer compartment inside is really helpful for meets and not needing to take additional bags.

I like the size of the the bag , and the color choice I wish it had a bigger inside.

This is a great backpack -- but it is enormous!!!

I've had it a few months and there's already wear and tear on the seams that are noticeable. I only removed 1 star as opposed to 2, because I'm very hard on my stuff.

Good quality and reasonably priced

exactly what I needed - large, solid, capable.

Plenty of space, but the base is very rigid and cannot fit in many lockers.