[Riley]

Socks and underwear are an excellent choice.

As to vests, he already has the PASGT one that he has to wear. If he puts on a Second Chance or something, I'd be concerned about overheating problems.

Which gives me an idea. The ballistic vest people have some kind of a special undershirt that is designed to keep a body-armor wearer cool. I know cops that use them- can't remember what they're called. Anybody?

We used to have salami and cheese and maybe some crackers for field munchies, too. C-rats and MREs get kind of old after a while.

[Riley]

http://www.actiongear.com/cgi-bin/tame.exe/agcatalog/level4c.tam?&M5COPY%2Ectx=26402

Here's one idea...

[Outlaw76]

Almost any fabric undershirt that wisks sweat away from the body would be very nice. Fabrics with technology like 'Air-Max' (you can find them at sporting goods store) will help keep a body cooler. Another to look at might be Under Armor's Heat Gear.

Most of that stuff is so new It didn't exist back when I had to deal with hot weather and heavy gear so I can't tell you how well it works under a pack and vest.

[E.Allen]

Coolmax is one of the brand names in polypropylene fabric shirts for wearing under ballistic vests, they are more comfortable, but expensive, about $25-$30 for a t-shirt. Most police vest suppliers carry them.