.pretty-select {
    width: 100%;
    overflow: hidden;
    background: none;
    border-radius: 2px;
    padding-left: 0;
    background-image: none;
}

.pretty-select select {
    background: #fff;
    line-height: 1 !important;
    border: 0;
    padding-left: 8px !important;
}
#search-box .input-group-btn select,
#search-box select.form-control{padding-right:3px !important;}