Every year, thousands of trekkers set out for the Himalayas armed with overstuffed backpacks and underperforming gear. After guiding over two hundred expeditions, the TravelEngine team has distilled the essentials down to ten principles that apply whether you are heading to Kedarnath or Kilimanjaro.
1. Layer, Don't Bulk
Three thin merino wool layers outperform a single heavy fleece at altitude. Temperature swings of 20°C between midday and nightfall are common above 3,500m. A base layer, mid-layer, and a wind-proof shell weigh less and pack smaller than any single all-in-one jacket.
2. Your Boots Are Non-Negotiable
Blisters end more treks than altitude does. Wear your boots at home for at least three weeks before your departure date. Socks matter too — merino over synthetic, always. Carry two spare pairs minimum.
3. The Sleeping Bag Rule
Whatever sleeping bag temperature rating your supplier recommends, go one rating colder. A sleeping bag rated 0°C means discomfort at 0°C for most people. A −10°C bag keeps you genuinely warm, and the weight difference is negligible at modern standards.
4. Hydration Is Strategy
At altitude, you lose moisture through breathing far faster than at sea level. Drink before you feel thirsty. Carry a 2-litre capacity minimum with a backup purification method.
5. Leave the Cotton at Home
Cotton kills at altitude. When it gets wet it loses all insulating properties and takes forever to dry. Merino wool and synthetic technical fabrics only.
6. Pack Your Pharmacy First
Diamox if your doctor approves, ibuprofen, rehydration salts, blister treatment, antiseptic, and a broad-spectrum antibiotic for remote areas. Your pharmacy kit should have a fixed slot in your pack that never gets borrowed for other items.
7. The Weight Test
Put your fully loaded pack on and walk upstairs briskly for two minutes. If you are breathing hard, it is too heavy. The target for a 7-day moderate trek is 8–11kg.
8. Documents Go on Your Body
Passport copies, permits, and emergency cash live in a flat travel wallet under your base layer — not in your bag.
9. The One Item Most Trekkers Forget
Lip balm with SPF. At altitude, UV radiation increases 10–12% per 1,000m. Pack two — one in your jacket pocket, one in your main kit.
Pack for the mountain you are on, not the mountain you wish you were on.
The best packing list is the one you have tested. Do a 2-day overnight hike before any major trek with the exact kit you plan to use.
