【Lightweight】1.5m x 1.0m Ultravario Zweig Ground Sheet UL Mountaineering

Variable Humidity Control × Fully Waterproof Ground Sheet
This is the WÜTOP® SD Vario Zwei, a high-performance humidity-regulating airtight sheet developed by the German tool and building materials manufacturer WÜRTH.
Designed to prevent condensation within house walls, this sheet is gaining attention among UL hikers and floorless shelter users as the next choice due to its high specifications.

■ Reasons for Choosing This Material
① Variable Permeability: A Smart Material
Variable permeability structure with an SD value of 0.15-5m (EN 1849-2).
It allows moisture to pass through when dry and blocks it when humid.
This is a fundamentally different design concept from sheets that simply provide waterproofing.
② Fully Waterproof (W1 Standard) × Thinness 0.22mm
Waterproofing performance is the highest W1 (completely waterproof) standard.
It is only 0.22mm thick and can withstand temperatures from -40℃ to 80℃.
The polyamide coating provides superior resistance to abrasion compared to Tyvek.
③ Two-Layer Structure: Non-woven Fabric × Film
Film side (waterproof) → Ground side
Non-woven fabric side (moisture absorption) → Tent/sleeping bag side
This orientation blocks moisture from the ground while allowing moisture from inside the tent to escape.
■ Specifications
• Size: Approx. 150cm × Approx. 105cm (5cm extra length cut)
• Weight: Approx. 105-118g (cutting error possible)
• Thickness: 0.22mm
• Waterproofing: W1 Standard (Fully Waterproof)
• Moisture Permeability Resistance: SD Value 0.15-5m (Variable)
• Temperature Resistance: -40℃ to 80℃
• Material: Polyamide Coating + Non-woven Fabric
■ Usage Scenarios
• Ground sheet for floorless shelters and poncho tarp camping
• Footprint for thin-bottomed tents (protects 15D-20D bottoms)
• As a sleeping bag cover (prevents condensation and dew)
• As a gear cover or emergency waterproof sheet
■ Notes
• As this is cut from a roll, there may be slight variations at the edges.
• Will be folded for shipping, so there may be creases.
• Please contact us separately if you require a specific length (width is fixed at 1.5m).

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