Amazing material; early morning cool dampness my neck stays warm; yet on a hot day it keeps my neck cool; I can"t explain it! Regardless; it works fantastic for me under different conditions. I use the tube for hiking; climbing; kayaking; and for winter use.this isn"t a one season product. your creativity for usage is almost endless.I especially love the sun protection "THE TUBE"provides.THANK YOU OUTDOOR RESEARCH! could I possibly hit you up for an assortment of OUTDOOR RESEARCH stickers/decals; never received any my last request! THANK YOU!