Trekking gear and equipment. What to take and what not to leave.

Backpack 30 - 40 litres
Breathable long underawear
Warm fleece
Gore-Tex pants and coat
Insulated, waterproof gloves
Warm mountain cap
Sun hat
Ski mask/buff
Sunglasses against UV-radiation
3 pairs of socks
Pair of well-trodden hiking boots
Sandals
Sleeping bag
Sleeping mat
Trekking poles
Personal hygiene items
Camping crockery
Headlamp
Personal first aid kit