My S&R unit are nearly out of blankets since other emergency-units (ambulances..) "borrow" them constantly. Our large mountain-cave stored catastrophy reserve have been shipped to Pakistan for the winter. a couple of weeks ago we had to use "tinfoil" rescuesheets to protect a crashed basejumper from wind and weater while the climbers took her down. It was not the same. You could never rip a woolen blanket if you tried, but this tinfoil.... prppt! pictures of the event