Having realized I don’t have a list of my trekking gear I usually take on longer trips, this is an attempt to create one - may be useful for others as well.
SLEEP
Tent. Lightweight, durable, waterproof. Currently use MSR’s Hubba Hubba HP. Actually prefer 3-person tent to 2-person thanks to more interior space for two people travelling.
Sleeping bag including a Waterproof bag; sleeping bag must not get wet. Currently use SirJoseph’s Koteka II 850.
(Air) mattress. Should be high enough to ensure sleeping comfort, yet easily to be packed (space-saving) and lightweight. Do use one of the older Term-a-Rest Prolite products that has been working perfectly for me for years. More recently, I also bought a more lightweight Therm-a-Rest NeoAir.
HIKE
Trekking boots are essential. Do use Gore-Tex & Vibram equipped pair of old Garmont Meindl Vakuum GTX boots which performed just OK despite the need of repair after the South Greenland trip. Lesson learned - it is not a wise idea to dry the boots too close to a fireplace - the protection gum may easily unglue from the boot. It is far better to hang them up and let the warm air to flow inside them. More recently, I also opted for Hoka Anacapa (both Mid and Low versions).
Light small backpack that weights close to nothing and may be easily used for day trips. Do have Tatonka Superlight Sea to Summit Daypack.
Trekking pole. I only use one pole, not a pair, (Leki Black Diamond Trail), however find it quite essential when hiking with heavy backpack.
Crocs. A Classic type of Crocs is both lightweight and durable, and is perfect for river crossings and hut/evening times after a long trekking day.
Drinking bottle. Always go with a SIGG Nalgene bottle of 1,5l size.
Mosquito net head cover. For spring/summer times in the areas of mosquitoes and midges. Those insects can be so irritating!
CLOTHING
Trekking trousers. Not a fan of Gore-Tex, I use Fjällräven Nils trousers and really like the material and its fit.
Light trousers or shorts. Very lightweight, for peaceful evenings in the campsite.
Jacket. Not opting for a Gore-Tex one, I have been using 66°North Skálafell - Rain Jacket for couple of years and it performs OK though it's far from being waterproof. More recently, I bought Sir Joseph's Trisul Light jacket.
Light down jacket. Very lightweight and easy to pack, useful for chilly evenings in the campsite as additional warming layer. Using 66°North Vatnajökull 800 down jacket and more recently, Mountain Equipment Baltoro Jacket.
Fleece / Merino hooded jacket / sweater. A suitable middle layer for colder times.
Raincoat (poncho). For rainy times on the trail; should be designed in the way that it also covers the backpack, not only the (human) body. More ecently, I do not take raincoats on my trips any more considering waterproof backpack and rain jacket.
Socks. Do usually use 4 3 pairs; two for trekking, one for evening time/sleeping bag, and another pair as spare ones. Merino wool seems to be perfect material since the socks dry fast and do not smell bad (or too much bad).
Long-sleeve shirts. Do usually use 2-3 pairs; one for hiking, another for a case of being completely wet (sweating) and/or evening time. The last one may be for the sleeping bag time only. Merino wool is again a perfect material for me.
Boxer shorts. 2 pairs are enough, usually changing for day/night use. Merino wool again works here perfectly.
Long underwear. Long johns are useful inside the sleeping as well as for chilly times on the trail/in the campsite (under light trousers or shorts).
Beanie & Hiking Head Scarf. Have a stylish handmade beanie bought in Bolivia :-).
Gloves. For cold times.
Blanket. Most underrated part of trekking equipment; would never go anywhere without one! Exchanged for Therm-a-Rest Camping Seat.
FOOD
Grape sugar (in plastic wrapping). Useful as extra portion of energy. Paper wrapping not suitable since it is not water resistant.
Fruit & nut bars. After some experiments, currently opting for fruit & nuts only bars like Raw Bite, Lifebar or Chimpanzee. Three Two One pieces a day is the optimal amount for me.
Effervescent multivitamins and ionic drinks. Usually go for Additiva’s Mango or Orange combined with Isostar tablets.
Tea. Tea bags; two bags per day.
Coffee. All-in-one; one per day. Aeropress is the way to go for true coffee lovers or, in a less complicated way, GSI Ultralight Java Drip that may be easily attached to a mug.
Breakfast food. Oatmeal with dried cranberries and nuts.
Dehydrated trekking food. This is the main meal of the day i.e. dinner. Usually opting for Travellunch which offers best price/quality/taste ratio IMO. Was quite disappointed with Mountain House (their Sweet & Sour Chicken was really horrible). In the past, I also tried Trek‘n Eat meals that were good though more expensive than Travellunch. More recently, Lyo Food seems to be the winner for me, occasionally also splurging into Norwegian Real Turmat food.
Bread. Traditional sourdough bread that easily lasts for more than a week is essential. Using it for lunch.
Cheese, Sausage, Prosciutto, Bacon. Go for traditional products that contain lot of meat.
Garlic. For seasoning trekking food and some natural antibiotics.
COOKING & EATING
Sponge. Though not necessary, makes washing up a cup or a spoon easier.
Set of plastic bags. At least one spare needed - as a portable waste bin.
Knife. Folding knife (with a corkscrew).
Spoon. Folding spoon (to be stored in a cup together with a sponge).
Cup. For tea, coffee and also breakfast.
Gas stove. Have recently tried MSR’s WindBoiler and have to say it performs just perfectly.
Gas canister(s). In an amount that is sufficient; this may be sometimes tricky to be calculated.
Lighter and Safety matches.
Garbage bag. Or two.
GADGETS
Mobile phone including Waterproof case and Map of the area for GPS usage. Currently use iPhone with Endomondo Strava app to track the route. Waterproof case is very useful in case of bad weather.
Portable charger. Anker Astro E4 lasts 8-10 days while charging my iPhone fully each night.
Charging cable for the mobile phone; connects to USB port of the portable charger.
PHOTOGRAPHY
Digital SLR camera. Here I do not compromise though it means much heavier equipment. I have been using Pentax DSLR cameras for years, currently using Pentax K-3 Sony Alpha A7 Mark IV with Sony FE 24-105mm f/4 G OSS lense.
Wide-angle lens. Best for landscape shooting, especially from high-elevation viewpoints.
Telephoto lens. Apart from portraits and wildlife shooting, they are useful for landscape shooting too.
Tripod. Although tried carrying heavy and sturdy tripod on one of the trails, currently prefer Joby’s Gorillapod Focus which is far much lighter and still very useful.
Filters and Filter holder. Having experimented with range of filters, I currently only go with Lee’s 0.6 HD Grad (helping with over-exposed sky) and another ND filter (+6 stop) for waterfalls shooting.
Batteries. Usually go with a pair of spare batteries.
HYGIENE & HEALTH
First aid-kit. Usually, I only go with a set of adhesive bandage for my foot.
Toilet paper.
Paper tissues. 3 packs usually do the job.
Toothbrush and Toothpaste.
Hygienic napkins and soap.
Outdoor towel. Not really pleasant, however dries quickly.
Sun lotion. Essential for those with shorter hair :-).
ACCESSORIES
Whistle. In a foggy weather and real white-outs, this may be essential instrument to avoid getting lost from the others (or to find the lost one).
Passport/ID including Waterproof case.
Washing line. A clothes line for clothes drying. May be used together with trekking poles.
Pen.
Papers. Or a small notebook.
Peg. Useful for both clothes drying and trekking food preparation (closes trekking food bags tightly).
Compass. Frankly, I have never used it. However, one never knows…
Duct tape. “Silver tape” or its equivalent, in a smaller size.
Glasses case with a Cleaning cloth.
Newspapers. May help you well in case of a need for a fire in an old-fashioned fireplace and may contain some interesting information as well :-).
Seating pad. May be replaced by either backpack itself or a blanket, however plastic seating pad may be very useful.
Fire starters. In case of huts with wood/coal heaters, fire starter squares may be quite useful, especially when there is no birch wood (bark) around.
Wallet. With both (local) money and credit card(s).
Keys. Have to go home after the trek :-).
Candles. May save some battery life of the headlamp and also help to create cosy atmosphere inside the hut.
Headlamp. Essential for long dark nights. Be sure it is fully charged before setting out!
FOR SPECIAL TIMES
Bottle of Scotch or Rum. There has to be something special to look forward to during long hiking days, at least for me. Some re-fill plastic bottles; however I prefer to remain in style i.e. in glass. getting older, I tend to do the same. Last moments of a day in a warm sleeping bag deserve something special :-).