Here are a few more tips regarding what to pack:
1. It is not compulsory to buy a special trek pant or trek suit. Normal track pants and t-shirts will do. Clothes of dri-fit/dry-fit material are helpful. I had just used 1 pair of waterproof gloves but you can carry that as per your personal preference. I would recommend a poncho over a raincoat as it is lighter and longer so you don’t need bottoms.
2. Eatables- You can carry dry fruits and dry snacks. For the 14 days that you live in the mountains, they provide chocolates, candies, biscuits and dry-fruits.
3. You can carry sachets of shampoo and conditioner. Carry face-wash, moisturiser, lip balm and paper soap/Dettol Squeezy.
4. Trekking shoes- Carry good quality, water resistant and preferably high ankle shoes as they provide good ankle support. (Suggestion- Decathlon Trekking or Hiking Shoes/Action Trekking Shoes). If you are buying new shoes, break into them. Wear them 3-4 times on a short hike before you go for the course to avoid shoe bites. If you decide to carry high ankle shoes, wear long socks inside that come above your ankle to avoid friction and shoe bites.
5. NIM Store- During my batch, we did not get time to go to the market and we were asked to buy whatever we want from the shop in the institute itself. It had everything needed for the course. Including poncho, detergent, shampoo sachets, dark goggles, chips, chocolates, souvenirs like NIM t-shirt, caps etc. If you want to withdraw money, withdraw it before entering the institute. There is an ATM in the main market at Uttarkashi.
6. Carry some extra money. You will have to pay about 200 rupees for insurance, about 100 rupees for graduation ceremony photographs, and also to eat something at the canteen. Since there is no network at Base Camp, you can make one call every alternate day from the satellite phone at Rs.50/min. Carry as little money and valuables as you can because theft may take place around you. You can even carry a lock for your bag for extra safety.
7. In addition to the list given by NIM, here are a few extra things you can carry. They are not compulsory but they might be helpful. Running shoes (physical exercise and running in high ankle trekking shoes can be uncomfortable), slippers, power bank, multipurpose scarf/bandana, hydration pack, 1L water bottle, detergent, small napkin, tissues/wet wipes, anti-bacterial/anti-fungal powder (to prevent rashes, infection, reduce smell), deodorant, ORS, very basic medicines (Medical Incharge always has all the medical supplies), 2 big extra polythene bags (when you go for training, you only have to carry some things in the rucksack. You can keep the rest of the things in these extra bags and leave it in the tent to keep things organised so you don’t have to empty your rucksack every morning before you go for training).