Stay-Put Straps That Never Slip The best straps are the ones you don't see or feel. That's the beauty of our T-back plus-size underwire bra with full support. WonderWire® design features a padded underwire with an extra layer of cushion to prevent wire poke. Easy on and off secure front closure. Stretch straps adjust to your fit. T-back prevents straps from slipping. Featured on our Best Front-Closure Bras guide.