The terms selvedge and non-selvedge are thrown around these days, but it may fall on ears that have no idea what it means :
The selvage (US English) or selvedge (British English) is the term for the self-finished edges of fabric. The selvages keep the fabric from unraveling or fraying. The selvages are a result of how the fabric is created. In woven fabric, selvages are the edges that run parallel to the warp (the longitudinal threads that run the entire length of the fabric), and are created by the weft thread looping back at the end of each row. In knitted fabrics, selvages are the unfinished yet structurally sound edges that were neither cast on nor bound off. Historically, the term selvage applied only to loom woven fabric, though now can be applied to flat-knitted fabric.
Natural Selection show us what’s to come for Spring Summer 2012. The British denim brand focuses on the basics, well made high quality denim, selvedge and non-selvedge with a choice of washes and weights. This selection includes some impressive light denim shirts, peacoats, braided leather belts, chinos and crew neck tees both printed and plain. Simple, solid. (Selectism)