210d polyester with a PA coating. Imprint on clear PVC safety window. Be sure to check out our blanket-bag combo. If you like this, be sure to check out our complete line of string backpacks: sportsman string-a-sling backpack, string-a-sling backpack, non-woven zip-side bag - 80gsm, non-woven textured string bag- 80gsm, econo non-woven string backpack - 80gsm, microfiber string backpack, designer ...