Ultralight 30 denier nylon with a double thick urethane coating Just the fabric, no seams, the coating itself prevents fraying
The best ground sheet out there—
Lighter, quieter, more waterproof, lower visual impact and more compact than Tyvek®
Less slippery and more waterproof than SilNylon
Tougher and nicer feel than plastic sheet
Also can be an improvised overhead shelter tarp. A super cheap way to get a small emergency tarp for your first aid or survival  kit. See this youtube video on how to use cord for making no sew tie outs on fabric.https://youtu.be/v_C3t06uHIY
Four sizes-
32X84″ for one person – 3.75 ounces
32×96″
64X84″ for two people – 7.5 ounces
64×96″
Shipping included in the USA
For 10% off use coupon code bpl ground
https://bivysack.com/shop/ols/products/ground-sheet
Also have some bivysacks on sale, basically a ground sheet with a DWR top (no netting) for $29 shipped.
https://bivysack.com/shop/ols/products/bivysack-drawcord-closure-347893c1-f915-4f24-8ca8-4c945cc42174
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