In a few short days you will travel from rain forest to near Arctic conditions. Packing efficiently is essential...
Your standard gear allotment is limited to 18-20 kg (35 pounds). Overweight or extra luggage will require an extra support crew which will cost you $20 USD per day. As long as you stick to the packing list below, you should be fine.
Packing Tips
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.
Be sure to break in your shoes before the hike!
Sleeping bag (Rated -9 °F/-25 °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)
You really only need one first aid kit in your travel group, so coordinate with your travel companions.