25% X Flex 75% Dura-Flex X Flex under arm panels for upper body freedom of movement Flatlock seam construction MODEL: JM-CLY09082225% X Flex 75% Dura-Flex X Flex under arm panels for upper body freedom of movement Flatlock seam construction Smooth Skin to minimise wind chill Titanium 2 reflects body heat back inwards Dura Skin for increased durability in wear areas