**Has sweater weather ever looked (and felt) *this* good?** The Derek Lam 10 Crosby Tirza Mixed Media Sweater combines a layered sweater-vest over blouse design, blending sophisticated textures for a stylish take on layering. **Has sweater weather ever looked (and felt) *this* good?** The Derek Lam 10 Crosby Tirza Mixed Media Sweater combines a layered sweater-vest over blouse design, blending sophisticated textures for a stylish take on layering. Named after the original NYC flagship store address, Derek Lam launched Derek Lam 10 Crosby in 2011 to elevate and transform everyday style through fit, form, fabric, color, and attitude.