In reply to BStar:
It's probably best to follow manufacturer's instructions as "they know it better". For most of "soft" garments (fleeces, socks, shirts, underwear, etc.), I just put them into washing machine with my laundry and it's fine. I do not like setting washing on high temperatures anyway. To be honest, I don't usually wash trousers, unless they really need to (I used DPM-like trousers and I have never seen them dirty, but they get chalky a lot).
However, wool garments need some extra care. They shrink if you use too high temperature. Again, follow manufacturer's instructions for them. I just put them together with all other things. My Devold Merino wool shirt and pants have been used daily for few winters (I grew up in country where temperatures between -20 and -30 degrees are common) and still use them in Scotland while sleeping. Still nothing wrong with them, though they are probably over 5 years old now.
Hard-shells with membrane (Goretex, Event or anything else) need some extra care. I don't wash them frequently, so I can't really comment on that. Seems that Techwash works well, but you might need to reapply DWR.
For down products, I would leave it to professionals. I would be too afraid to do anything with my down sleeping bag.
Boots? Clean with appropriate cleaner and reapply water repellent.
Post edited at 19:45