Fashion-conscious DS1 (who already has a newish Vans rucksack) has been supplied with a strong, sleek, black laptop backpack as part of his DSA package for university. It is deliberately unbranded (the DSA equivalent of NHS spectacles) but it meets with his approval.
I tried to hint to DS1 that he might want to donate one of the rucksacks to DS2 for sixth form, but he feels that it will be essential for him to take both with him.
So DS2 is carrying on with the North Face Recon he has had since the beginning of Y7. Not the most stylish bag in the world (and looks a bit outdoorsy/hikingy to wear with a suit) but it is ergonomically the best backpack we've come across, which is important for DS2's small frame and hypermobile joints. Luckily he doesn't care about image or fashion.