此类产品还有很多细的分类:Primaloft还有Primaloft　ONE,　Primaloft　Sport,　and　Primaloft　ECO等各种针对不同环境使用的分类。　那么,如何选择?这个问题,摘抄一段分享给大家,文字来自美国的一个户外装备的讨论网站,原文详见:http://www.outdoorgearlab.com/Insulated-Jacket-Reviews/buying-advice　Do　I　want　down　or　synthetic　insulation?　The　answer　largely　depends　on　your　intended　use.　Down　is　a　superior　insulator　in　many　respects　-　it　is　warmer　for　its　weight,　and　is　much　more　compressible　than　synthetics.　Moisture　and　wet　weather　however,　are　down's　kryptonite.　When　wet,　down　is　unable　to　maintain　its　loft.　It　loses　its　ability　to　keep　you　warm.　This　is　where　synthetic　insulation　is　able　to　shine　-　though　not　as　warm　for　its　weight,　and　less　compressible　overall　compared　to　down,　synthetic　insulations　are　much　better　at　maintaining　their　loft　when　wet,　and　are　therefore　able　to　somewhat　insulate　you　even　when　wet.　So　which　is　better?　This　depends.　If　you　are　recreating　in　weather　that　is　primarily　dry,　say　the　desert,　or　in　very　cold　conditions　where　moisture　is　low,　down　is　t