Hey Sonu,
Here are the list of must things you need to have before you go on a trek to Himalayan mountains :-
Back pack with rain cover ...
Day pack with rain cover ...
Walking stick or Trekking poles ...
Two water bottles ...
Personal medical kit ..
Sun cap
Wollen cap
Balaclava
Sun glasses are the must ...
Trek pants ...
Fleece jackets ...
Down jacket ...
Thermal inner ...
Cotton socks ..
Wollen socks..
Trekking shoes ...
Gaiters to save shoes ...
moisturizer...
lip balm ...
water proof gloves ...
that's it all ..
for the brand of trekking poles ... it's obviously Quechua from decathlon ...
The entire trek essentials you will get them in decathlon ...
Happy Trekking and Happy Travelling!!!
Hey!! Some of our fellow travellers have already suggested the things that one needs to carry. However I would like to suggest that many of the Pass and roads are closed during winter. Even some treks are cancelled due to severe weather conditions. So do check relevant sites to know about this. Hope this was useful:)