And they who work in the finest flax. As he spoke of mourning, so he now speaks of shame; for they who formerly earned an abundant livelihood by this trade will have no gains. Now, the two occupations are closely connected, to weave nets and to fish. Yet it is doubtful if he speaks of those only who manufactured nets; for if we understand sryqvt, (sErikOth) to mean certain very fine linens, it is probable that the latter clause relates to other productions of the loom, manufactured out of small fine thread, and of the most elegant workmanship. We know that linens of very great value were woven in Egypt, and there may be good reason for interpreting the phrase white nets, or, as we have rendered it, "perforated," to mean also linen garments, which were more costly in proportion to the greater delicacy of their texture. It will thus be a metaphorical expression, by which the Prophet indirectly taunts them with their unbecoming luxury, alleging that the Egyptians cover themselves with linen garments in the same manner as if they clothed themselves with a net. If this meaning be adopted, it will agree with the following verse; and indeed I do not see how such exquisite skill in weaving can be applied to fishing. But if it be thought better to understand the whole as relating to fishes, the meaning will be, that they who had been much employed in fishing, and had found it to be a profitable occupation, will be overwhelmed with sorrow. [1]

Footnotes

1 - "And ashamed (disappointed or confounded) are the workers of combed (or hatchelled) flax, and the weavers of white (stuffs.) The older writers supposed the class of persons here described to be the manufacturers of nets for fishing, and took hvry, (hOrai,) in the sense of perforated open work or net-work. The moderns understand the verse as having reference to the working of flax and manufacture of linen. Knobel supposes hvry, (hOrai,) to mean cotton, as being white by nature, and before it is wrought. Some of the older writers identified sryqvt, (sErikOth,) with sericum, the Latin word for silk. Calvin supposes an allusion in the last clause to the diaphanous garments of luxurious women." -- Professor Alexander.

Moreover - In addition to the calamities that will come upon the fishermen, the drying up of the river will affect all who are supported by that which the overflowing of its waters produced.
They that work in short flax - Egypt was celebrated anciently for producing flax in large quantities, and of a superior quality (see Exodus 9:31; 1-Kings 10:28). The fine linen of Egypt which was manufactured from this is celebrated in Scripture Proverbs 7:16; Ezekiel 27:7. The Egyptians had early carried the art of manufacturing linen to a great degree of perfection. As early as the exode of the Hebrews, we find that the art was known by which stuffs made of linen or other materials were curiously worked and embroidered. 'And thou shalt make an hanging for the door of the tent, of blue, and purple, and scarlet, and fine-twined linen, made with needlework' (Exodus 26:36; compare Exodus 27:16; Exodus 36:37). So Ezekiel 27:7 : 'Fine linen, with broidered work from Egypt.' So also Martial refers to embroidery with the needle in Egypt:
Haec tibi Memphitis tellus dat munera; victa est
Pectine Niliaco jam Babylonis acus.
Martial, xiv. Ep. 50.
In regard to the "fineness" of the linen which was produced and made in Egypt, we may introduce a statement made by Pliny when speaking of the "nets" which were made there. 'So delicate,' says he, 'were some of them, that they would pass through a man's ring, and a single person could carry a sufficient number of them to surround a whole wood. Julius Lupus, who died while governor of Egypt, had some of those nets, each string of which consisted of 150 threads; a fact perfectly surprising to those who are not aware that the Rhodians preserve to this day, in the temple of Minerva, the remains of a linen corslet, presented to them by Amasis, king of Egypt, whose threads are composed each of 365 fibres.' (Pliny, xix. 1.) Herodotus also mentions this corslet (iii. 47), and also another presented by Amasis to the Lacedemonians, which had been carried off by the Samians: 'It was of linen, ornamented with numerous figures of animals, worked in gold and cotton.
Each thread of the corslet was worthy of admiration. For though very fine, every one was composed of 360 other threads, all distinct; the quality being similar to that dedicated to Minerva at Lindus, by the same monarch.' Pliny (xix. 1) mentions four kinds of linen that were particularly celebrated in Egypt - the Tanitic, the Pelusiac, the Butine, and the tentyritic. He also says that the quantity of flax cultivated in Egypt was accounted for, by their exporting linen to Arabia and India. It is now known, also, that the cloth used for enveloping the dead, and which is now found in abundance on the mummies, was "linen." This fact was long doubted, and it was until recently supposed by many that the cloth was made of cotton. This fact that it is linen was settled beyond dispute by some accurate experiments made by Dr. Ure, Mr. Bauer, and Mr. Thompson, with the aid of powerful microscopes.
It was found that linen fibres uniformly present a cylindrical form, transparent, and articulated, or jointed like a cane, while the fibres of cotton have the appearance of a flat ribbon, with a hem or border at the edge. In the mummy cloths, it was found, without exception, that the fibres were linen. Vast quantities of linen must, therefore, have been used. The linen of the mummy cloths is generally coarse. The warp usually contains about 90 threads in the inch; the woof about 44. Occasionally, however, very fine linen cloth is found, showing the skill with which the manufacture was executed. Sir John G. Wilkinson observes, that a piece of linen in his possession from Egypt had 540 (or 270 double) threads in one inch in the warp. Some of the cambric which is now manufactured has but 160 threads in the inch in the warp, and 140 in the woof. It is to be remembered, also, that the linen in Egypt was spun by hand, and without the aid of machinery (see, on this whole subject, Wilkinson's "Ancient Egyptians," vol. iii. pp. 113-142. Ed. Lond. 1837). The word rendered 'fine' here denotes, according to Gesenius, "combed or hatchelled." The word 'fine,' however, expresses the idea with sufficient accuracy. Fine linen was used for clothing; but was so expensive that it was worn chiefly by the rich and by princes Luke 16:19.
They that weave networks - Margin, 'White-works.' According to Gesenius the word הורי hôrây means "white linen" - that which is fully bleached. The word הוד hôd means "a hole or cavern," but is not applied to cloth. The parallelism seems rather to require that the word should mean 'white,' or that which would correspond to 'fine,' or valuable; and it is not known that the Egyptians had the art of working lace from linen. Saadias supposes that "nets" are meant, as being made with holes or meshes; but it is evident that a finer work is intended than that.
Shall be confounded - Hebrew, 'Shall be ashamed.' That is, they shall be thrown out of employment, and not know what to do.

They that work in fine flax - פשתים שריקות pishtim sericoth, heckled flax, i.e., flax dressed on the heckle, or comb used for that purpose. The Vulgate uses the word pectentes, combing.
They that weave networks shall be confounded - And confounden schul ben that wrogten flax, plattinge and webynge sotel thingis. - Old MS. Bible.

Moreover they that work in fine flax,.... Of which they made fine linen cloth, and yarn, and was much wore by the Egyptians, and was the commodity of the country, and for which other nations traded with them, 1-Kings 10:28 but now would have no flax to work, that being withered and gone which was sown by the sides of the brooks, Isaiah 19:7 and no linen cloth or yarn to sell, and consequently in great confusion and distress, as they are here represented (l). The Targum renders the whole verse thus,
"they shall be confounded which work flax, which they comb, and of it weave nets;''
and so Jarchi and Kimchi interpret it, not of persons that wrought in flax, to make yarn or linen of it; but who combed it, to make nets of it, as follows:
and they that weave networks shall be confounded: because they would have no sale for their nets, the fishermen having no use for them, the rivers being dried up. The word for "networks" signifies "holes", because nets are made with holes large enough to let the water through, and so small that the fishes may not get out. Some render the word "white works" (m), white linen, white cloth, of which white garments are made, such as nobles and princes formerly wore; hence, in the Hebrew language, they are called by a name of the same root and signification; but the former sense seems best.
(l) is by us rendered "fine"; and so, Ben Melech says, in the Arabic language the best and finest linen is called and so says Kimchi in Sepher Shorash.; with which Schindler agrees, Arab. sericum or "muslin"; but it is a question whether this is of so early a date, and especially not fit to make nets of. De Dieu and Bochart think it denotes the colour of the linen, which was yellow, that being the best; but others render it "combed". (m) "et textores alborum operum", Junius & Tremellius, Piscator.

fine flax--GESENIUS, for "fine," translates, "combed"; fine "linen" was worn by the rich only (Luke 16:19). Egypt was famous for it (Exodus 9:31; 1-Kings 10:28; Proverbs 7:16; Ezekiel 27:7). The processes of its manufacture are represented on the Egyptian tombs. Israel learned the art in Egypt (Exodus 26:36). The cloth now found on the mummies was linen, as is shown by the microscope. WILKINSON mentions linen from Egypt which has five hundred forty (or two hundred seventy double) threads in one inch in the warp; whereas some modern cambric has but a hundred sixty [BARNES].
networks--rather, white cloth (Esther 1:6; Esther 8:16).

They - That make fine linen, which was one of their best commodities.