You will have enough acclimatization days on this trip to reach Everest Base Camp and Kalapatthar. Therefore, when you take two rest days in Namche and Dingboche, your body will already acclimate to this environment. According to our previous guest, most hikers completed the treks without obstacles. We wish you all to reach the base camp without any challenges. If we need oxygen, we can get it from the teahouse. Most teahouses have an oxygen bottle. For this, you must pay the cost yourself.