We've taken our gum blankets to a new level by producing instead, something that is exceedingly authentic and of highest quality. 
A reinforced canvas tarp, with a slit and flap in the center which allows it to be used as a poncho, coated on one side with rubber vulcanizing, this is a versatile tool for any 20th century enthusiast. Rubberized ponchos and gum blankets were used by the Army during the American Civil War and continued in use until 1908. 
Our version is a copy of the 1906 Army regulation poncho, the last of the rubberized canvas products made for the Army.  By 1916, all of these had been surplussed out of military use and were available to the public, the Army favoring new materials designed for WWI. They became quite popular for outdoor enthusiasts of all types. They make a great ground vapor barrier for a bedroll, an excellent shield against wind and rain, and are useful for covering parts of your automobile in case of rain or used as a shelter. They can also be cut and re-sewn to make spare tire covers, side curtains, etc. They are mentioned in "Motor Camping on Western Trails" (1925) by Melville Ferguson as an indespensible motor camping item. 
Ours measures significantly larger than the Civil War version, approximately 66" by 90" with reinforced grommets. (Please note that there is some variance in width, ranging from 62" to 66".) The original regulations called for 3 ball and socket fasteners on the head hole flap. We opted not to put these on the poncho, in case some folks would prefer them without, but we do offer the ball and socket hardware on this website for $5 for three fasteners and you can sew them on yourself. The rubberized coating is high quality and is not sticky like some versions you may have seen.
Here are the Army regulations for the 1906 poncho:
"1906 Poncho
Specification No. 849, adopted by the Army on December 8, 1906
(Rubberized Cotton Sheeting)
Dimensions: According to its specifications, the 1906 Poncho was to be 90 inches in length and 66 inches in width. It was to weigh not less than 3 pounds, 12 ounces and not more than 4 pounds, 2 ounces.
 
Material: The body was made from “good quality one-half bleached sheeting weighing not less than four (4) ounces to the linear yard (36 inches wide).” The sheeting was thoroughly coated with a compound composed of various rubbers, tar, lampblack, and sulfur.
 
Hardware: Three ball and socket fasteners were used to seal the flap that covered the poncho’s center opening. Twenty brass grommets were placed around the edge of the poncho. Seven grommets were placed on each side, equally spaced and running from corner to corner. Three additional grommets, also equally spaced, were placed on the top and the bottom between the two corners.
 
Description: The 1906 Poncho was made from two halves divided in the center lengthwise. The center opening through which the head passed when the poncho was worn as a “cape” was 13 ½ inches long. The opening was covered by a flap made from the same rubberized fabric as the poncho that was 3 inches wide at the center and approximately 5 inches wide at both ends. When worn as a cape the flap formed a collar that could be secured by a ball and socket fastener glove fastener. The edges of the poncho had a ½ inch wide flat ribbon binding cemented to each of its edges. Each brass grommet was also reinforced by a 1 ½ inch square “stay piece”.
 
Contract Label: The name of the contractor and the date of the contract were to be stamped in one corner of the poncho."