Field prototype · pre-order

A portable canopythat blocks mosquitoesand electromagnetic fields.

Nullhaven is a travel-ready bed shelter that fuses a fine-mesh mosquito net with a lightweight conductive shielding textile. One suspension point, four ground stakes, thirty seconds from stuff sack to sleep — for digital nomads, frequent travelers, campers, and anyone whose sleep hygiene refuses to live at home.

Join the waitlistView product detailsHow it works
packed
~640 g
apex height
~210 cm
RF attenuation
38 → 20 dB
Nullhaven canopy set up outdoors as a portable shelter, viewed from the exterior.
Exterior view · field prototype

The Nullhaven brief

Three protections. One packable shelter.

Designed for travelers, campers, and digital nomads who want a calmer place to sleep wherever they unpack.

01

Portable insect protection

A fine-mesh inner envelope forms a bug-sealed sleeping space for nights away from home.

02

RF shielding

A conductive textile layer is characterized for attenuation across the radio bands you sleep under.

03

One-point setup

One suspension point and four ground stakes take it from stuff sack to sleep in approximately thirty seconds.

How it works

Two skins, one shelter.

Nullhaven is two concentric envelopes hung from the same apex line. The outer shell is a tough ripstop rainfly. The inner envelope is a hybrid textile: a highly conductive silver-coated or Swiss Shield–style weave, interlaced with a breathable insect mesh. Bug protection and RF attenuation are baked into a single layer instead of stacked into something two-people-can-barely-lift.

20D RIPSTOPSHIELDING + MESHVENTED AIRFLOW
Cross-section, not to scale. Ripstop above; conductive weave + insect mesh below.

Measured, not hyped

Published figures, not vague claims.

The shielding textile is characterized at the RF bands you actually sleep under. Numbers below are representative of prototypes in our lab — final production units ship with a measured per-band attenuation sheet, and we publish the full report rather than a single combined percentage. Cautions from bodies like the FCC and WHO on EMF science stand; we make no medical claims.

700 MHz – 3.8 GHz

Cellular 4G/5G

Tower + device downlink

38 – 24 dB

2.4 / 5 GHz

Wi-Fi

Router, hotspots, mesh

24 – 20 dB

2.4 GHz

Bluetooth

Wearables, peripherals

~22 dB

1.1 – 1.6 GHz

GPS / GNSS

Location services

~26 dB
Typical attenuation across the band · prototype, lab measurement
700 MHz1.5 GHz2.4 GHz3.8 GHz5 GHz6 GHz40 dB30 dB20 dB10 dB

Packability

From stuff sack to sleep.

A featherweight pop-up frame, a ripstop outer skin, and a single-pole geometry make setup a one-person, thirty-second job. Packs into a stuff sack sized for a 30-litre backpack — or your carry-on, if you travel light.

  1. 01

    Find a single suspension point.

    Tree branch, beam, balcony hook, or the included ridgeline cord strung between two anchors.

  2. 02

    Unfurl and stake the base.

    Four ground stakes tension the ripstop floor into a taut, bug-sealed rectangle.

  3. 03

    Move the suspension line around you.

    Slide along the ridgeline until the canopy hangs clear of your face. Sleep.

Specifications

The data sheet.

TermValue
Packed size~22 × 14 × 14 cm
Packed weight~640 g (1.4 lb)
Set-up height~210 cm at apex
Sleeping footprintSingle, ~200 × 90 cm
Suspension1 point + 4 ground stakes
Outer skin20D ripstop nylon, DWR-coated
Shielding layerSilver-coated Swiss Shield–style weave
Insect mesh1200-hole polyester, EN 13561 mosquito barrier
Vented panels4 mesh windows, top + sides
Pack & carryStuff sack, fits a 30 L backpack

FAQ

Common questions.

Direct answers, no hedging. If yours isn’t here, write to nullhaven@polsia.app.

Nullhaven / next steps

Keep exploring Nullhaven.

Get clear answers, compare travel canopies, and learn how the two protection layers work together.

Follow the next prototype update.

Join the waitlist for the next Nullhaven field-prototype update.

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