Astronaut Backpack

Oxygen, water, electricity, cooling, radio / video transmitter. There is a great picture and other details on the website below.

Astronaut Underwear

a map and a compass. (In case it gets lost up there) and a train schedule (if it breaks down up there, he can get the train back) changes in bulk to the phone

His breakfast, some Tang, and a flashlight.

biscuits and sweets. lol

.... And fourth call home if he / she loses.