Neckwest lanyard Loon USA 

The Neckvest Lanyard is more versatile and sturdier than ever. New features include the light and durable paracord construction and five Nite-Ize S-carabiner attachments, which offer secure storage and maximum convenience. Also included are a Hot Box fly box, Bottoms Up floatant holder, Rogue Nippers with comfy grip, a horizontal post for storing tippet, a padded/adjustable next strap and quick release. 

Durable paracord construction
FiveNite Ize S-biner attachments
Adjustable length 

How to use: Use barrel lock to loosen/tighten to desired size and fasten securing clip to shirt. To add tippet to Tippet Holder: unclip the Tippet Holder from one of the S-biners securing the Tippet Holder, as well as one of the washers. Add tippet spools to the Tippet Holder, then return washers. Clip the Tippet Holder back in place.