Derek Rose Jack Men\'s Hipster. Our Jack Black Pima Cotton Stretch Hipster is a sartorial essential that we have crafted from an incredibly soft blend of 92% Pima cotton and 8% elastane. We cut this fitted hipster for a simple, classic fit with a shorter leg and a closed front. We secured the hems by manual welting — all part of our quest for a minimalist, streamlined look and the ultimate in softness and comfort. Derek Rose is dedicated to designing comfortable, understated garments from quality fabrics and this hipster is no exception, with its fabric-covered waistband for gentle skin contact.