Please find the trekking gears as follows: 
Bags: Duffle Bag / Rucksack for the porter to carry and one day bag pack to carry your needed things for the day.
Headwears: Sun Hat, Woolen Hat
Neck wears: Muffler, Buff, Shawl as a dust or cold protection
Buddy wears: Gore –Tax Jacket & Trouser Waterproof & windproof, Fleece, down or fabric jacket, Shirts and T-shirts, Warm and thin cotton Trousers, Thin layer, Jumpers/thermals for the sweat and to wear for cold mornings, underwear/panty very important.
Hand wears: Gloves Thick & Thin
Footwears: Comfortable, good sole, ankle support (4 seasons) trekking shoes waterproof, thick shocks, thin shocks, a pair of flip-flop/slippers and light sport shoes for the campsite.
Sleeping: (4 seasons) Minus -20 or below Sleeping bag to have good nights to good sleep in the Lodge or Tent
Trekking: Dry Bags, may be Umbrella, Trekking Poles
Drinking: Water Bottles must be hard plastic or Almunieam & Thermos/flash bottle 1lit. For carry tea or hot water for high altitude/high passes
Medical & Wash Kit: Own First Aid Kit, Wash & Bath Kits & Towel
Personal Items: Camera, Charger, Book, Music & Flash Light/Head touch Spare Batteries alarm Clock
Sun Protestations: Sun Glass, Sun cream
Other Items: Small but very important (sewing kit), Packet Swiss knife, Insect repellent, Lip salve/Lip Guard, Small bottle of hand sanitizer, Wet wipes (very handy), Cotton Liner for sleeping bag, Dairy, Card Binocular, Water purification tablets we are environment friendly, we avoid the plastic mineral water bottle, Gaiters (for walking through snow & peaks)

Possibility to Buy and Hire

Almost all kind of equipment (Fake and Branded!) you can hired and buy in Kathmandu and also there are some possibilities in higher in Mountain like you are going to EBC you can buy in Namche Bazaar. For the Annapurna you get chance in Pokhara anything you may need in terms of equipments, food snacks, medicines and obviously the Souvenirs.

Baggage Allowance on Domestic flight to Dolpo, Jomsom & Lukla

Please note down that standard Baggage limits in domestic airlines are 10kg and with hold in the hand bag 5kg. Of course you can live your extra Travel bad or city clothes Hotel in Kathmandu or Pokhara. Surly it can be good Tip for you that you can wear your heavy things Jackets, trekking boots to help cut down on the weights of your bag. If you have extra heavy baggage then pay an extra charge for airplane and we need to get more porters, so therefore it will charge you an excess cost for the trip to be paid in cash.