Pack that the Support crew they will carry for you on Mountain is limited to 18-20 kg (35 pounds). Overweight or extra luggage will require an extra support crew which will cost you 20$ Dollars per day.
Wrap clothing in waterproof plastic bags.
In your day pack, take along water, sunglasses, camera, rain pants (trouser) and jacket at a minimum. Add any other items you might need during the day because you may not see the Support crew until end of your trek day.
Bring double extra sets of batteries as cold weather shortens their life.
Carry high standard climbing gear on the airplane in case baggage is delayed.
You want your inner layer to be wicking -- no cotton. Next layer should be insulating and warm, and the top layer should be water proof but breathable. You will need clothes for hiking during the day, lounging in the evening, and for sleeping. Layers are important as temperatures vary greatly.
Your clothing should be lightweight, breathable, hand-washable, and quick-drying.
Shorts, mid-thigh or longer
Long pants (zip-off pants are very useful)
Sport bras for women (roads can be bumpy)
Sweater, jacket, windbreaker
Rain racket and pants or rain poncho
Sun hat with brim and chin strap
Bandana (for dust, washing, etc.)
Fleece jacket or wool sweater
Mittens and/or gloves (waterproof, one thin pair, one thick pair that can be layered)
Wool or pile hat
Balaclava or neck gaiter
Hand and foot warmers (chemical activated)
Down jacket or parka (for temperatures below freezing plus wind)
Be sure to break in your shoes before the hike!
Trekking shoes for hiking during the day, preferably warm, waterproof, and with ankle-support -- not too light and not too heavy
Tennis shoes or sandals for lounging in the evening
Hiking socks for warmer conditions
Wool socks for colder conditions
Sock liners to wick away moisture
Gaiters (for mud and scree)
Snow cleats (optional)
Sleeping bag (Rated -9 degrees F/-25 degrees C or colder is recommended)
Sleeping pad and repair kit
Large duffel bag or backpack with rain cover, for porters to carry
Day pack and rain cover, for you to carry , filters, memory disks (you will not be able to download)
Video camera, tapes
Nail clippers, file, and brush
Moist towelettes (handi-wipes)
Hairbrush, comb, mirror
Small towel and washcloth
Lip balm with sunscreen
You really only need one first aid kit in your travel group, so coordinate with your travel companions.
Ibuprofin, Aceteminophen, or Aspirin
Disinfectant, antiseptic cream, antibiotic ointment
Gauze bandages and tape
Melatonin or other sleeps aid
Malaria pills (get advice from doctor)
Antibiotics (get advice from doctor)
Prescription drugs (get advice from doctor)
Diamox for altitude (get advice from doctor or your leading Guide on the mountain)