Similar to the original lululemon Speed Short. We designed these technical shorts for training runs and race day too Swift Ultra Woven for strength and no-bulk performance—Swift Ultra fabric is sweat-wicking, four-way stretch and engineered to feel light and covered lightweight coverage no-bulk performance woven for strength four-way stretch sweat-wicking LYCRA® Added LYCRA® fibre for great shape retention stretch great shape retention long-lasting comfort Luxtreme® Cool-to-the-touch Luxtreme® fabric waistband is four-way stretch, sweat-wicking and provides a secure fit sweat-wicking four-way stretch cool smooth handfeel