What I call the Real McCoy’s N1 spl “special”. Started with the N1 Spl and made some adjustments. Replaced the alpaca sleeve lining with quilted nylon for an easy on/off. Had the left over alpaca from the sleeves put inside the pockets for extra hand warmth. Had the sleeves extended a bit and had horsehide leather added to the sleeve ends and pockets slits. Fits like a dream (to me) and is truly a unique piece.