I am going to buy a bit more kit for walking and have been looking tonight at rucksacks

Anyone have any experience of Osprey Rucksacks? As I'm looking into getting one as well as the 2.0l hydration sack
http://www.cotswoldoutdoor.com/osprey-kest...colour=123

I have a berghaus wind proof jacket which a good one, a goretex shell jacket and sprayway waterproof trousers

Is it worth getting those aluminium water bottle? And will add a jetboil flash to the kit too

My brother wants to get out more too do will be getting out and about more and more, then chatting to a friend last night he also goes out walking, catches train in to dales and does a 15mile + walk (bit much for me at the moment ) Former Mod/Member, with the most post & Chicken George Arch nemesis

Osprey have a pretty good reputation. I'm personally a huge fan of Lowe Alpine. If you can find one the Airzone Centro 35 is a brilliant rucksack for day tripping. Mine has taken several years of hard use and is still going strong. Osprey always come out well in the gear reviews though. With regard to water bottles, buy a Sigg-nothing else comes close for durability.

These, http://www.cotswoldoutdoor.com/sigg

How much water is recommended for a days walk? One I these plus a 2L hydro sack?

Plus any for food? Etc Former Mod/Member, with the most post & Chicken George Arch nemesis

Yes that is correct for the water bottles. They are a little more than other brands but it is like comparing a FL2 to a KIA-both are ok on the road but one is considerably more durable off it! I personally prefer to travel quite light and just use a 1Litre water bottle for autumn/winter walking. 3kg (or 3L) doesn't sound much but it is if you are humping it around all day and not drinking it. Hope that helps.

I used to take 2 when snowboarding, and often sucked it dry in half a day, but often was hung over  Former Mod/Member, with the most post & Chicken George Arch nemesis

Personally unless it's a hot day I wouldn't consider taking on water for a 15 mile hill walk or a half marathon run,

I have always thought along the lines of better take drink than not Former Mod/Member, with the most post & Chicken George Arch nemesis

Not current thinking , more chance of depleting mineral reserves and getting hyponeutrenia by over hydrating( potentially fatal) than getting ill effects from under hydration.

AFAIK there has not been one death of a casual walker from over hydration, on a warm/hot sunny day it will be enough to take 2L of water with you for a day's walk and just drink when you are thirsty, simple

I take 1L with me and sometimes wish I had taken more and other times it was enough, your body will dictate to you when drink is needed. With me the onset of a mild headache tells me I should have had that 'sip' a little earlier.

sod that water is heavy travel light, plan a route with a pub at a convenient location, be sure to be passing at at lunch time, and take the number of a local taxi firm with you. At work
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i was looking at cotwolds outdoors site and they had tablets you pop in your drink to add minerals back to the body

i doubt i would take more than required, a 1 to 2 L pack and maybe a 500 ml bottle for a brew or soup with a jetboil PCS if i take it if the weathers colder and i want something warm (or a flask)

i'm actually quite looking forward to getting out and about, the kids seem to be too, though their walks would have to have some interest in them, like yesterdays walk on the beach at Filey, (not that far, and unable to get on the Brig as the tide was just going out) and my brothers dog cant walk that far now due to heart failures onset Former Mod/Member, with the most post & Chicken George Arch nemesis

38L seems big if you're only looking at a day's walk.
Think about what you really need to carry and get a rucksack sized accordingly. You don't want to be carrying unnecessary weight and the more room you have, the more you'll stuff in it.
There are plenty of day sacks that have an expander zip if you need a little extra. I use an old berghaus 12/18L which has a separate pocket for a hydration bag and although it's frameless, it's still quite comfy.

The reviews state it's a great day sack, as it has compression straps on the side to reduce the size, so you get best of both worlds.

Also been 6'3" my trousers, waterproof jackets are not the smallest

But will try it out for size before I buy Former Mod/Member, with the most post & Chicken George Arch nemesis

If you have a Cotswold Outdoors shop nearby, pop in and tell them what you're after. The one near me have always been incredibly helpful, with the staff very knowledgeable, without trying to sell me stuff I don't need or outside my budget.

i can get 15% discount buying on line with them, but plan on trying all needed prior, not sure if they are local, but can travel  Former Mod/Member, with the most post & Chicken George Arch nemesis