Just arrived.
The reservoir is exactly the same in both.
Its a 1.5ltr.
The Palos weighs 520grams
The flashflo weighs 420grams
(Both with labels still attached)
The Flashflo is a bit smaller and more discrete. The Palos is a bit bulkier and enduro bright blue.
I’ve put a 3kg dumbell in them and bounced round the house. Both seemed ok although there was some up/down movement. That said I would expect similar from a rucksack.
The Palos has a stiffer back which did seem to handle the weight a tad better.
Internal space – the Palos doesn’t seem that much bigger but the Palos has a roll tube on the back which you could use to stash a proper jacket in. I’m not sure I would though as it would stick a long way out and make the pack feel unstable. The Palos also has hip pockets which can be handy.
While the reservoirs are identical they have different clips on the mouth piece. The Palos has a magnetic clip on the waist belt. The flashflo has a clip you can attach to your shirt or the waist belt (it’s more faffy to do that than the Palos one)
I’m probably going to keep the flashflo. I’m looking for something as small and light as possible to carry water in (and is easy to drink out of as I go along). If I need to carry more water I have a small very light bag type water bottle which will sit inside with no bother.
I’m only looking to carry water, possibly a gopro (or camera phone) and a tiny ultra light jacket. I keep all my tools and spares in Mr TW’s back pack.
That said he might end up with the Palos. They look ideal for our holiday. (Uplift in a hot place.)
I’ll do you some photos.