Running

I use the OMM bags of various sizes, would recommend.

How much are you carrying? I don't take anything with me on runs (as most of my runs at the moment are less than an hour), but I'll start using my flipbelt again when I start increasing mileage. It's nice not having a backpack when you're not carrying enough to justify one, and all the weight sits on your hips so you don't notice it.

Inov8 race vest.
https://www.peteblandsports.co.uk/buy/inov-8-race-elite-vest_4661.htm
Use code MAY10 for an extra 10%

Lightweight, fits great and moves well - I'm an odd shape and it doesn't rub at all. There's lots of adjustment in the various straps to get it snug but not restricting.
I've had: Waterproof jacket and trousers, spare top, gloves, hat, map, lots of food, phone, 1.5l of fluids (2x500ml in the strap holders, one in the bag) all fit in there no problem. It's also just as happy with a 500ml bottle, jacket in the back and a couple gels in the straps.

I've had it and used it a lot for 3 years and it has held up great and I have no real complaints about it.

I have:

• a flipbelt (mine has two compartments so I can fit quite a lot of stuff but I find belts always move around on me)
  
• decathlon vest with a bladder (can fit a fair amount, lots of pockets)
  
• osprey rucksack with bladder (love this bag so much, fits tons, stays still on my back when I run)
  
• fucking massive rucksack that I run commute with as I have to take my laptop home every night (HATE this bag and it hates me, I've got chafe marks all over my back from this hateful bag, would not recommend)