A tailsock using lycra fabric and small aluminium tubes adds very little weight. Front and rear fairings have been shown to be beneficial for long wheelbase bikes, but front fairings are less beneficial for short wheelbase bikes. Front fairings and bodysocks have the advantage of blocking wind and rain on cool days, and a bodysock can help block the sun on bright days.
A tailsock made from lycra fabric and small aluminum tubes is lightweight.  Front and rear fairings are beneficial for long wheelbase bikes, but front fairings are less helpful for short wheelbase bikes. Front fairings and bodysocks provide wind and rain protection on cool days, while a bodysock can block the sun on sunny days.