Now, to the busy week ahead on the international space station. Astronauts are gearing up for a another dangerous spacewalk to finish fixing that broken cooling system. But first, they have a serious wardrobe malfunction to take care of. Abc's mike boettcher explains. Reporter: In a crippled international space station, a successful christmas eve spacewalk would be the best gift of all for the six astronauts on-board. Station houston with you. Hope everybody had a good day. Reporter: A saturday spacewalk brought them halfway to that goal. American spacewalkers rick mastracchio and mike hopkins removed a broken 780-pound coolant pump, whose failly jeopardized operations aboard the space station. Don't let that go. That's a stocking suffer. Reporter: But a malfunction in mastracchio's suit -- my toes are quite cold. Reporter: Forced the postponement of a second spacewalk, scheduled to complete the repairs. We want to dry that suit out overnight. Reporter: For the second spacewalk in a row, water in the space suit was an issue. Just to be safe, the astronauts will use a backup suit. It's their life support system. Somebody on the ground, team on the ground is making a big plan to put that new suit together. Reporter: This is the suit they're wearing. Behind glass in a display at the johnson space center. At 35 years old, it could be a museum piece, but nasa always facing budget constraints, must make old things work. We've done over 11,700 hours of spacewalking. So, I think it was just a small blip in the road that just happened to catch us. Reporter: And so nasa and the astronauts onboard the space station have this christmas hope -- that those aging space suits are gifts that keep on giving. Mike boettcher, abc news, at the johnson space center, houston.