Lite SteamASeam has the pressure sensitive adhesive the "stick" on one side which allows for a temporary hold to the appliqu material. It shifts easily on the second material allowing you to quickly reposition your appliqu pieces until pressed with an iron for a permanent bond. Once fused, can be machine washed and dried or dryclean. the manufacturer does not recommend drying with a dryer sheet Bond is strong and permanent.Will not gum up your needle. The Lite SteamASeam is 12 the weight of the regular version. Ideal for sheer lightweight fabrics plus delicate ribbons, trim and lace. 9"x12" sheets. 5 sheets per package.