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 

• Trekking boots or light weight walking shoes. Having comfortable footwear is essential for a good trek. Make sure all footwear is broken in well prior to your trek. Do not break in boots on your trek. 
• A track suit and a pair of track shoes to wear in the tea house and camp at night 
• Two pairs of woolen socks for trekking shoes and track shoes 
• Warm down jacket and rain proof jacket with hood for protection from rain 
• Woolen hat for the cold and sun hat or cap for sunny days 
• A pair of woolen gloves and a pair sandals to wear in tea houses or camp 
• Two cotton T-shirts and two pairs of long shorts/skirts 
• Woolen shirts and thick sweaters as well as wind and water proof trousers 
• Pair of light or heavy weight trouser and one light weight long sleeve shirt 
• Two pairs of thermal undergarments 
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Equipment for Trekking 

• Trekking or duffle bag to carry trekking gear. Royal Nepal Group can provide a duffle bag for you to borrow during your trek. This will be returned to Royal Nepal Group after your trek 
• Trekking daypack for personal items such as water, snacks, extra layers, and camera 
• Water purification tablet and bottles 
• Sleeping bag 
• Travel Pillow 
• Snow and sun glasses 
• walking poles 
• umbrella 
• Small torch light or head lamp with spare batteries 
• Sun block 
• Lip balm with sunblock in it 
• handkerchief or wiping papers 
• Money belt 
• first-aid kit 
• Reading materials, notebook, envelopes, trekking maps, binocular, pens, camera, I-phone, pocket knife, photos, games like cards, chess etc. 

Trekking equipment is available at Kathmandu and Pokhara. Royal Nepal Group 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.