What to take on a hike in the mountains? Equipment. Regardless of the weather, a hiker’s backpack should always include waterproof and windproof clothing, such as Gore-tex, and warm clothing (fleece, thermal underwear, etc.). In winter, a spare pair of warm gloves is a must. You will also need sunglasses and, possibly, a ski mask and helmet. It is advisable to have a traveling blanket with you. More