i[class*=wasp-icon-] {
    display: inline-block;
    background: transparent url(../img/iconset.png) no-repeat;
    vertical-align: middle;
}

i.wasp-icon-facebook {
    background-position: 0 0;
    width: 16px;
    height: 16px;
}
i.wasp-icon-twitter {
    background-position: -32px 0;
    width: 16px;
    height: 16px;
}