Rapha, nice but a bit pricey?

Tom Bihn makes very nice bags, ships from the factory in Seattle. I find my Synapse 19 bit on the heavy side (when compared to cheap decathlon things ofc) maybe due to the fabric or the excessive number of pockets... https://tombihn.com/

travel backpack

I bought one to replace a really worn-out Deuter bag when I changed roles a few years ago. Feels a bit plastic-y and it's very boxy in shape. It's okay as a daily (haven't cycled with it ever, mind!) but I'm not sure I'd replace like-for-like as and when it eventually comes to the end of life. Just enough capacity to make it useful for weekend trips, but it's a tight squeeze.

My wife's Briggs & Reilly (also bought when changing roles, thanks in no small part to vouchers from the previous one!) is definitely a better looking backpack overall and is certainly 'smarter' in terms of layout.

I've got one too, it's well made and I like the reflectivity, which has proved more durable than I expected. As above it's very rigid, which I think may reduce the comfort somewhat. No chest strap if that's an issue for you. It's fine for my needs, but I lucked out on eBay. I suspect there's better & cheaper designs.

I’ve got a chrome one I use on trips. Laptop sleeve, plenty of pockets and room for clothes. Even has space for a pair of cycling shoes and helmet in places you wouldn’t otherwise use.

I have the travel bag, i've used it for everything other than riding a bike.

It worked great for me for business trips / flights but it's very boxy, i never liked getting on a bike with it. The clamshell design is good though and i would recommend getting that design for any travel type bag tbh.

I found 25L was a bit cramped - I have a 30L bag I use more often now.

If you're going to spend that sort of money there are better options out there - there are entire forums on Reddit dedicated to this topic too, common recommendations are things like the Bellroy Transit for example