P cotton is a kind of thermal insulation material, which was originally developed for the US Army. There are some differences in performance between gold-labeled P cotton and silver-labeled P cotton. The warmth retention of Jinbiao P cotton is stronger, which is about 1.5 times that of down, and it can still maintain 98% warmth retention when wet, so it is suitable for use in extremely cold environment. Silver-labeled P cotton has weaker warmth retention than gold-labeled P cotton, but better air permeability and sweat absorption, which is suitable for high-intensity aerobic exercise such as daily long-distance walking and mountain climbing in winter. Generally speaking, gold-labeled P cotton pays more attention to keeping warm, while silver-labeled P cotton is more suitable as a filling material for sportswear. In addition, it can also be identified by tags. P Cotton tags are divided into gold tags and silver tags. Elasticity can also be seen by squeezing. Gold-labeled P cotton is generally fluffy and resilient, while silver-labeled P cotton is relatively compressed and has poor elasticity.