Head:
Hat or scarf for the sun
A thin balaclava or a warm wool hat
Hats and sunglasses
A headlamp
Arms and shoulders:
T-shirts made of cotton or thermals
Jacket made of fleece
Jacket that keeps water out
A down jacket
Legs and feet:
Long pants made of light cotton
Pants that don’t leak
Feet:
Thin underwear
Hiking socks made of thick, warm wool
Hiking boots that fit well
For your hands:
Hands gloves
Adding on:
Blanket that is rated for 0°C
Duffel bag or trekking bag
Big plastic bags (to keep things dry inside the trekking bag)
Trekking poles (not required but suggested)
A camel bag or a water bottle
Personal care items like toothpaste, toothbrushes, and more should be included in toiletries.