Navigation does not stay fixed

[Alexie81]

Hello,

My name is Alexie.

I have a suggestion:

Navigation doesn't stand still when I scroll down only when I scroll up again, and this is pretty annoying.
I think you should stay put whether you scroll up or scroll down and just leave:

$(function () {

    $(window).scroll(function () {

        if ($(this).scrollTop() < 50) {
            // hide nav
            $("nav").removeClass("vesco-top-nav");
            $("#back-to-top").fadeOut();

        } else {
            // show nav
            $("nav").addClass("vesco-top-nav");
            $("#back-to-top").fadeIn();
        }
    });
});

I hope I was helpful, it's just a personal opinion...