Recommended fabrics for the Deer and Doe sewing pattern Sirocco jumpsuit are mediumweight jersey or interlock knit (cotton, rayon, wool) containing elastane, with good recovery and at least 60% stretch. Allow extra fabric to match stripes or plaids.. Sirocco is a mock-wrap knit jumpsuit with short set-in sleeves and pleated pants. Version A has tapered legs, version B is a romper.