This is a set of three stuff sacks made from 15D silnylon waterproof fabric. (※Although it is a waterproof fabric, please consider it as a simple waterproof as the seams and the opening of the bag are not completely waterproof.) Sizes: Large 20 x 40cm / 21g / approx. 12L, Medium 16 x 33cm / 14g / approx. 6L, Small 12 x 28cm / 10g / approx. 3L Colors: Large - Orange, Medium - Chartreuse Green, Small - Sky Blue Despite being an ultra-thin and ultra-lightweight 15D material, the fine and high-density fibers provide high strength and abrasion resistance. The siliconized PU-coated nylon also has excellent surface smoothness and a smooth, soft feel. The ultra-thin material allows the contents to be seen slightly, making it easy to see what's inside, and the smooth surface makes it easy to put in and take out of bags and backpacks.