Sentence:  Mum sent me climbing clothes from Geneva after I told her I was doing it: threequarterlength galaxy-print leggings and a silver sports top. I like the top because it has a <WSD>crossback</WSD> that makes my shoulders look strong. 
Meaning of the word marked with <WSD> tags:  Two pieces on the back of an item (for attaching or bracing it) which form an "X".