Challenge ULTRA™ 800X MEMBRANE LOGO 3 stuff sack blanks and

3 stuff sack blanks and 1 practice blank pre-printed

Originally designed for the US military

9 oz polyester ripstop with a DWR (Durable Water Repellent) finish

Designed for both right- and left-handed use

Challenge ULTRA™ 800X MEMBRANE LOGO 3 stuff sack blanks andDescription WHOLESALE Looking to buy larger amounts at 25 40% savings? Click HERE for full roll sales. Update from Challenge: After feedback from thousands of packs in the field from many brands, we have decided to improve the bias strength and improve longevity of Ultra by inserting a very thin, black Ultra CrossPly yarn at 45 degrees to the warp. Unless you've been living under a rock, you've probably heard the buzz around Ultra fabrics from