Supermodel Helena Christensen appears nude except for her footwear in a campaign for Reebok’s new EasyTone trainers.

“With my busy schedule it’s a perfect way to do something without spending hours in the gym,” Christensen said in a statement abouty EasyTones. “Im impatient, when I try something I like to see results immediately. I could feel these working right away which is why Ive stuck with them.”

The New York-based model boasts that the shoes are so comfortable, they feel “like you are walking on sand.”

“You can really feel them working and Ive noticed a difference in just a few weeks,” she adds. “By the end of the day you can feel it in your legs almost like you have done a workout.”