Any solid black glove that is rated for winter wear. This includes driving gloves and skiing gloves. Just make sure they are all black.
HATS:
Sage colored fleece watch caps can be found at the Army/Navy store or sometimes at the squadron for a small price. $4.95
Boot Socks:
If you purchased warm weather jungle boots for your cadet, their toes will freeze quickly in the winter. Please purchase quality wool or Thinsulate black socks to wear in the winter months. Double up on them if you have too. Also, don't wear cotton socks as they will get wet and that can bring on frost bite.
Shortcuts for warmth
You can just buy the fleece jacket and all the rank and name tapes and get by for most weather, but the rain will still soak you. Another idea is to just get the GORTEX raincoat and get a cheap liner for the M-65 jacket at the Army/Navy store. These can be had for under $20 and you just wear them over the ABU coat and under your GORTEX jacket.
You can wear regular long underwear top under your tan t-shirt so long as the long underwear can't be seen.
General rule: if it's worn under the ABU uniform, it must be sand or tan colored. IE t-shirt and belt. If it's worn over the ABU uniform it needs to be sage colored or ABU digital tiger stripe.