If your tour operator specifies that they do not provide sleeping bags, you will need a warm sleeping bag for the Inca Trail trek. Where possible, we recommend that you bring your sleeping bag. Some may be available for hire locally (for approximately US$15), but please check with your operator first. If you are planning to hire a bag, bringing a silk sleeping bag liner for added warmth and comfort is a good idea.
A four-season* (or -10) bag is recommended for the winter months. At other times, you will probably be fine in a 3-season (or -4/-5) bag, although this depends on how much you feel the cold and is given as a guideline only. Roll mats are provided on the Inca Trail; however, for greater comfort and warmth, Thermarest-style mattresses can also be hired in Cusco for US$15.
*Please note: If you are travelling in winter and you do not wish to invest in a 4 season bag, you may want to consider purchasing a 3 season bag plus a sleeping bag liner and bringing additional clothing