You should dress according to altitude and the environment you will be located in. Most treks are in high altitude climates in remote areas. Therefore, there are often large temperature swings. Temperatures are often colder at high altitudes. Most of the clothing and equipment you will need for your trek can be found in the capital city of Kathmandu.
Clothing for Trekking
Equipment for Trekking
Trekking equipment is available at Kathmandu and Pokhara. Trekking Planner can recommend shops for you to purchase equipment.. If you do not wish to buy equipment you can easily hire or rent equipment for the duration of your trek. Rental prices are reasonable.