Flat Groundsheet

$119.00 USD Weight 2.4 oz / 67.0 g

Lead Time Ships in 1-3 Days

Very happy with purchase! No complaints - high quality and durable as all Zpacks products are!

– Henry W., ★★★★★

Your tent protects you every step of the way, from harsh rainy nights to dew dropped mornings. Shield your tent floor from unnecessary wear and tear, and add longevity with a flat groundsheet.

Our tent floors are reasonably durable as-is but an extra layer doesn’t hurt for peace of mind.

This is also available as Poncho which also doubles as a pack cover.

Check out more of our Shelter Add-Ons.

  • Constructed from 1.0 oz/sqyd Dyneema® Composite Fabric. The material is waterproof, and and has good abrasion and puncture resistance for its weight.

  • The perimeter has hemmed edges, and there are stake loops at the corners and at the center of the sides.

  • Groundsheets for our freestanding tents feature elastics with loops at the corners allowing for the groundsheet to be attached to the tent poles at the corners of the tent.

  • The dimensions of the flat groundsheets are a couple inches narrower and shorter than the tent floor that it fits to avoid rain water pooling on the groundsheet.

  • Bathtub style groundsheets for use under flat tarps are available here.

  • All Zpacks gear has a two year limited warranty against defects in materials or workmanship. Please see our return / warranty policy.

  • Made in the USA.

**The dimensions of the flat groundsheets are about two inches narrower and shorter than the tent floor that it fits to avoid rain water pooling on the groundsheet.

Plex Solo / Plexamid Size

26" ends x 36" center x 88" long / (66 cm x 91 cm x 223 cm)

Altaplex Size

34" x 88" (86 cm x 223 cm)

Duplex / DupleXL Size

43" x 88" (109 cm x 223 cm)

Triplex Size

58" x 88" (147 cm x 223 cm)

Offset Solo

34.5" from head to mid-torso tapering to 30.5" at the foot x 92.5" (87.5 cm to 77.5 cm x 235 cm)

Offset Duo

48.5" from head to mid-torso tapering to 42.5" at the foot x 92.5" (123 cm to 108 cm x 235 cm)

Offset Trio

64" from head to mid-torso tapering to 59" at the foot x 92.5" (162.5 cm to 150 cm x 235 cm)

Made with Bio-Based Dyneema® Fiber

Reduce your carbon footprint with bio-based Dyneema® fiber technology. Sourced from renewable, bio-based feedstock, it is the first ever bio-based ultra-high molecular weight polyethylene (HMPE) fiber. Commit to sustainability and help reduce our reliance on fossil fuel resources and rely on the trusted performance of the world’s strongest fiber™. Click here to learn more about our sustainability initiatives.

Made in the USA.



1.0 oz/sqyd Dyneema® Composite Fabric

Dyneema® Composite Fabric is composed of high strength Dyneema® fiber laminated inside a polyester membrane. It is inherently waterproof and does not require any coatings or DWR treatment. Dyneema® Composite Fabric has very high tensile strength for its weight and does not stretch.

1 oz/sqyd Dyneema® Composite Fabric has a thicker membrane giving it more abrasion resistance. We use it for dry bags, tent floors, and groundsheets.


Tensile Strength:
 104 lb/in (911 N/5cm)

Puncture Strength: 3.5 lb (15.5 N)

Water Resistance: 20,000 mmH₂O

Made in the USA.