Valkyrie Skyrim Mods - What you see around my character's neck is from a mod called HDT Scarves. This add 6 different colored HDT scarves into the game. That colors currently are:
Keeping Warm - Scarves and Mufflers at Skyrim Nexus - Mods and Community
Is There A Black Version of Airy's Scarf? - Skyrim Non Adult Mods - LoversLab