Tyvek is a great material for ultralight backpacking and as a groundsheet for protecting the bottom of your tent!
It is strong, light weight, smooth and resistant to water, rot, mildew and abrasion. It has a high strength to weight ratio and when you wash it, it becomes softer, quieter and more manageable. It won't bunch up under your tent like other materials.
Size: 0.9m x 2.3m
WASHING YOUR TENT GROUNDSHEET PRIOR TO USE:
You want to make sure you allow extra width and length when cutting your groundsheet because after you've washed it, it shrinks approx 5%. Wash it on a cold cycle with mild soap. Do not put in the dryer or iron the tyvek as it will melt.
I suggest putting it in for 2 short cycles with cold water.
This is not Tyvek 1443R but the thicker Homewrap Tyvek.
Arrived within a couple of days of ordering, put it through a couple of cold wash cycles as recommended and worked great to protect my tent (and me!) without adding much weight on a very rainy backpacking trip last week.
It's super useful to be able to buy Tyvek in smaller quantities than those commercially available elsewhere. The order process was easy & the delivery quick. Also appreciated the invaluable advice from Lisa on various items of lightweight hiking gear.
Great service...delivered super fast, in time for our great walk.
Bought more out of curiosity, yet to seriously use. Washing has reduced incredible crackle
Ive used Tyvek as a ground sheet for many years works perfectly.
Ultralighthiker was super quick with shipping and highly recommend them!