[31:22] 1 tn The first word of the thirteenth line begins with מ (mem), the thirteenth letter of the Hebrew alphabet. The word rendered “coverlets” appears in 7:16, where it has the idea of “covered.” K&D 17:335 suggests “pillows” or “mattresses” here. The Greek version has “lined overcoats” or “garments,” but brings over the last word of the previous verse to form this line and parallel the second half, which has clothing in view.
[31:22] 2 sn The “fine linen” refers to expensive clothing (e.g., Gen 41:42), as does the “purple” (e.g., Exod 26:7; 27:9, 18). Garments dyed with purple indicated wealth and high rank (e.g., Song 3:5). The rich man in Luke 16:19 was clothed in fine linen and purple as well. The difference is that the wise woman is charitable, but he is not.
(NT only) to listen to the NET Bible 
