It is important to pack light for the days in the mountains, however you can always leave extra baggage at your hotel. Additionally you could hire a porter who could help with your bag. (Try to keep it at a maximum of 15kg.) For higher altitude it is advised to bring a sleeping bag and a warm jacket. (Both could be rented in Thamel or Pokhara for the duration of your trek) Any other gears or trekking clothes could be purchased in one of the trekking shops in Thamel or Pokhara for a reasonable price.
This packing list is just a reference to plan your trek and travel in Nepal. We always say just take what you really need.
BAGS
Bigger backpack and/or day pack (approximately 30-40l) with a rain cover
One extra bag if you want to leave anything at the hotel
ACCESSORIES
Sleeping bag rated to zero degrees F *
Sun hat or scarf
Warm hat
Sunglasses with UV protection
Gloves
CLOTHING
Thin, lightweight inner socks
Thick, warm wool hiking socks
Extra pair of socks (for the evening)
Under Garments
Trekking pants and/or shorts
Lightweight cotton long pants
Light and expedition weight thermal bottoms (seasonal)
Fleece, wool pants (seasonal)
Waterproof (preferably breathable fabric) shell pants
A comfortable pant or a trouser for the evening
T-shirts
Light and expedition weight thermal tops
Fleece jacket or pullover
Fleece Wind-Stopper jacket (Optional)
Waterproof (preferably breathable fabric) shell jacket
SHOES
Hiking boots
Light shoes (sneakers, sandals or flip flops)
Gaiters for hiking in winter
ACCESSORIES
Flashlight or Headlamp
Small pad or combination lock-to-lock
Basic First Aid Kit and other medication as needed
Large plastic bags – for keeping Items dry inside or for dirty laundry
Day pack (approximately 2500 to 3000 cubic inches)
Trekking Poles
Water bottle (thermos for hot beverage)
Ear Plug (if light sleeper)
Portable power charger and cables
TOILETRIES/ PERSONAL HYGIENE
Travel towel
Tooth brush/paste
Multipurpose soap
Nail cutter
Hairbrush if needed
Sun cream and lip balm
Wet wipes (baby wipes)
Tissue /toilet roll
Anti bacterial hands wash
Small laundry detergent (if needed)
EXTRAS
camera (and if needed extra memory cards and battery)
Binoculars
book or Kindle
Trail Map/Guide book
Journal, notebook & Pen
Travel game like cards etc.
small snacks, power bars etc