Thunder Brief -50 mm navy blue, white and grey elastic waistband. -Navy blue full mesh body. -White cotton cup with navy blue stitching. -Grey leg elastic. You’ll get the perfect combination of support and subtle style with our PUMP! Thunder Brief. Dark blue mesh provides the perfect backdrop for the white double-lined cup, finished by gray details for a style that makes a statement without going overboard. Our signature mesh will help your body breathe, while the elastic stays with you and provides lift and support to your butt.