New Tunewear Softshell Color Soft Rubber TPU Back Cover Case for Iphone 6 Smoke An art form at 1.4mm 1.4mm is the ideal thickness to protect the new larger iPhone 6 from drop damage. The integrated "Sound-FUNnel" adds volume, bass and texture to audio and music. The TPU case material is slip and slide proof. Integrated dust covers protect the headphone jack and lightning connector.