Review on ColdPruf Basic Layer Sleeve Black by Jerome Brooks

I'm not sure what it's used for as it's VERY thin and transparent. Another buyer posted pictures and they are very accurate. I know they won't last long. for a few washes with threads sticking out on some shirts. Unless you have a specific reason for polypropylene, which I wouldn't understand, it's like any nylon shirt. I can't say anything about the size because I didn't try the product after seeing it but sent it back. I work in the cold and I suggest: https://www.amazon.com/Russell-Performance-Baselayer-Thermal-Bottom/dp/B015QSMDTQ/ref=sr_1_5?ie=UTF8&qid=1549127263&sr=8-5&keywords=russell%2Bthermals % 2Bfor %2Bmen&th=1&psc=1https://www.amazon.com/Russell-Performance-Tech-Baselayer-Thermal/dp/B01BNB1DLO/ref=pd_sbs_193_3/147-0567142-8021154? _encoding=UTF8&pd_rd_i=B01BNB1EMW&pd_rd_r=00a3980c-270d-11e9-9e3c-7da984d71310&pd_rd_w=57Oxj&pd_rd_wg=CVOHg&pf_rd_p=588939de-d3f8-42f1-a3d8-d556eae5797d&pf_rd_r=9GZDT9DGYT260QW 9CCA0&refRID=9GZDT9DGYT260QW9CCA0&th=1&psc=1ORhttps://www.amazon.com/Duofold-Heavy -Weight-Double-Thermal/dp/B006SRT0V4/ref=sr_1_8?ie=UTF8&qid=1549127559&sr=8-8&keywords%duofold%2Bmen 2Bthermal%2Bunderwear&th=1&psc=1https://www.amazon.com/Duofold-Weight-Double- Thermal-Medium/dp/B006SRT0FA/ref=sr_1_9?ie=UTF8&qid=1549127559&sr=8-9&keywords=duofold%2Bmen%27s%2Bthermal%2BUnderwear&th=1&psc=1https://www.amazon.com/dp/B07HRR2MXY/ref= emc_b_5_i