The cultural attitude towards women in Egypt is different from that of the West, so travelling as a solo female does require consideration to ensure a more comfortable travelling experience. The best way you can avoid unwanted attention is to dress conservatively at all times, and this means keeping shoulders and upper arms, legs, and chest covered with loose-fitting and opaque clothing. The hot Egyptian sun might tempt you to do the complete opposite in order to perfect your tan, but you'll demonstrate respect for the local culture if you make an effort to dress more appropriately. In the Red Sea resorts, the Egyptian staff are more familiar with Western culture, and therefore, a more relaxed attitude toward clothing is generally not a problem. Like any large city anywhere in the world, it's advisable to avoid walking the streets of downtown Cairo at night. If you do receive any unwanted attention, it is best to appear standoffish, as any friendliness can be misconstrued. Egypt is by no means a dangerous place for female visitors. Egyptians are hospitable, friendly, and humorous people and are likely to leave a lasting, positive impression of their country. It is sensible, however, to be cautious and respectful of the local customs in order to make the most of your time in this incredible country.