in action on shop.du.ae
.header-1 {
font-family: DuCoHeadlineBold;
font-size: 36.4000015258789px;
font-style: normal;
font-weight: normal;
letter-spacing: normal;
line-height: 36.4000015258789px;
text-transform: none;
color: #323232;
}
Co Headline is available from Typekit.
Found by @DSadykov on 12 Feb 2015.