What it is
The Secretsculpt Biker Shorts 4" is part of CRZ YOGA's biker shorts range. It uses Secretsculpt fabric - a firmer, sculpting knit with more hold than Butterluxe, aimed at a lifted, supported look.
Not sure on sizing? CRZ YOGA runs close to true-to-size for most people, but the two fabric lines fit differently - the size guide and the Butterluxe vs Secretsculpt guide break down which to pick. For washing and keeping the fabric soft, see fabric & care.