Also, do the Gore gilets have very small rear pockets?
Mine’s the Alp-X 2.0 SO Zip Off. It has a front chest zipped pocket. The rear has three pockets. The outer two are zipped, so good for keys, wallet etc plus gels, food whatever. The central pocket is a large pouch type which will easily take a bottle.
I’ve not run out of space with mine.
I took my arm warmers off halfway round a 50 miler on Sunday as the temperature increased. I stuffed them into my short sleeved jersey pocket which was under my gilet with no problems.
Not the cheapest, but being able to zip sleeves off gives it 3-4 season use.
I bought mine from Biketreks when I was in the Lakes, but these TGStore seem pretty good on price.