---
title: "3F UL Gear Tyvek Bivy Mummy"
name: "3F UL Gear Tyvek Bivy Mummy"
brand: "3F UL Gear"
description: "The ultralight 3F UL Gear Tyvek bivy sack is the ideal solution for anyone who likes sleeping under a tarp and wants to keep their sleeping bag dry and clean."
handle: "3f-ul-gear-tyvek-bivy-mummy"
sku: "3FGTB-M"
ean: "6970919907025"
gtin: "6970919907025"
canonical_url: "https://gramino.com/p/3f-ul-gear-tyvek-bivy-mummy"
html_url: "/p/3f-ul-gear-tyvek-bivy-mummy"
md_url: "/p/3f-ul-gear-tyvek-bivy-mummy.md"
locale: "en"
market: "eu"
currency: "EUR"
price: 41.8
price_formatted: "€41.80"
availability: "InStock"
item_condition: "NewCondition"
category: "Sleeping accessories"
category_path: "/c/sleep/sleeping-accessories"
breadcrumbs:
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    url: "/"
  - name: "Sleep"
    url: "/c/sleep"
  - name: "Sleeping accessories"
    url: "/c/sleep/sleeping-accessories"
  - name: "3F UL Gear Tyvek Bivy Mummy"
    url: "/p/3f-ul-gear-tyvek-bivy-mummy"
last_updated: "2026-10-13"
---

# 3F UL Gear Tyvek Bivy Mummy

Brand: 3F UL Gear · Category: [Sleeping accessories](/c/sleep/sleeping-accessories.md)
Material: Tyvek · Material composition: Polyethylene · Dimension: 230 × 90 cm

## Offer

- Price: €41.80
- Availability: In stock
- Condition: New
- Buy on the website: [HTML product page](/p/3f-ul-gear-tyvek-bivy-mummy)

## Description

The ultralight 3F UL Gear Tyvek bivy sack is the ideal solution for anyone who likes sleeping under a tarp and wants to keep their sleeping bag dry and clean. Thanks to good breathability and water resistance, it reliably protects you from morning dew and condensation. An ideal addition for minimalists looking for effective sleep system protection without extra grams.

## What makes this product special?

An ultralight Tyvek bivy sack that protects your sleeping bag from moisture and dirt.

material – Tyvek, highly breathable and durable, closed footbox for complete moisture protection of your feet, top section opens with a zipper, protects the sleeping bag from condensation and dirt, weight 203 g (196 g bivy + 7 g pouch), unpacked size 230 × 90 cm, packed size 16 × 8.5 cm, mummy cut suitable for Regular-size inflatable sleeping pads (both mummy and rectangular), includes a compression pouch, slightly water-resistant – recommended for use under a tarp or single-wall tent, clean only with clean water and no detergents

## Specifications

**Tyvek Bivy** from 3F UL Gear increases the efficiency and insulation of your sleep system. The bottom section (footbox) is fully closed to perfectly protect your feet from moisture, while the top section can be easily unzipped thanks to the zipper. This system not only **protects against condensation**, but also improves thermal comfort. If you prefer **sleeping under a tarp**, it's the ideal choice for you.

The bivy sack is made from durable, lightweight **Tyvek** material, which ensures **high breathability**, so you won't wake up to a wet sleeping bag from condensed moisture.

The bivy sack optimally fits **mummy or rectangular inflatable sleeping pads in size** **Regular**. We don't really recommend it for larger sleeping pads. Even though they'll fit, the sack becomes tighter and can compress the sleeping bag's insulation.

The bivy also protects your sleeping bag from dirt, extending its lifespan. At just **203 grams**, it's one of the lightest ways to protect your sleep out on the trail.

## Parameters

- Material: Tyvek
- Weight: 203 g (196 g bivy + 7 g pouch)
- Unpacked size: 230 × 90 cm
- Packed size: 16 × 8.5 cm
- Cut: Mummy (suitable for Regular-size sleeping pads)
- Package contents: bivy sack, compression pouch

**Important notice and care:** Tyvek is slightly water-resistant, so it's recommended to always use it under a shelter (tarp, single-wall tent). Clean the bivy sack only with **clean water and no** **detergents**, to avoid damaging the material's structure and losing its functional properties.

## Specs

- Color: White
- Material: Tyvek
- Material composition: Polyethylene
- Dimension: 230 × 90 cm
- Packed dimensions: 16 × 8,5 cm
- Weight: 203 g
- Woocommerce product id: 189596
- Brand: 3F UL Gear

## Related

- [Cumulus Aerial 250](/p/cumulus-aerial-250.md)
- [DD Hammocks SuperLight Tarp](/p/dd-hammocks-superlight-tarp.md)
- [Sea To Summit Ether Light XT™ Insulated](/p/sea-to-summit-ether-light-xt-insulated.md)
- [Cumulus Panyam 450](/p/cumulus-panyam-450.md)
- [Liteway Biggie Tarp](/p/liteway-biggie-tarp.md)
- [Big Agnes Rapide SL Insulated](/p/big-agnes-rapide-sl-insulated.md)
- [Yate Emergency Blanket Silver](/p/yate-emergency-blanket-silver.md)
- [NEMO Tensor Elite](/p/nemo-tensor-elite.md)

## Shipping and returns

- [Shipping and payment](/shipping-payment)
- [Returns](/return-order)

## Images

- ![3F UL Gear Tyvek Bivy Mummy](https://media.gramino.com/medusa/tyvek-bivy-sack-3-01KX1A0EJY0NQ6XQ5MBCSWPTM3.jpg)
- ![3F UL Gear Tyvek Bivy Mummy](https://media.gramino.com/medusa/bivy-sack-3fulgear-2-01KX1A0EWZ10BDSHTHE5DS5KPS.jpg)
- ![3F UL Gear Tyvek Bivy Mummy](https://media.gramino.com/medusa/tyvek-bivy-sack-1-01KX1A0F6196F50E3DDJKSDSHY.jpg)
- ![3F UL Gear Tyvek Bivy Mummy](https://media.gramino.com/medusa/bivy-sack-3fulgear-5-01KX1A0G3SWQGYP7V4N4MFKPZ2.jpg)
- ![3F UL Gear Tyvek Bivy Mummy](https://media.gramino.com/medusa/tyvek-bivy-sack-2-01KX1A0FSPJSK2597S80ECY09P.jpg)
- ![3F UL Gear Tyvek Bivy Mummy](https://media.gramino.com/medusa/bivy-sack-3fulgear-4-01KX1A0GFFAH2CHTJD2QAC17X2.jpg)
- ![3F UL Gear Tyvek Bivy Mummy](https://media.gramino.com/medusa/bivy-sack-3fulgear-3-01KX1A0FFP57ZBR06HAK46DQ82.jpg)

## Identifiers

- SKU: 3FGTB-M
- EAN: 6970919907025
- Handle: 3f-ul-gear-tyvek-bivy-mummy
- Brand: 3F UL Gear

This product is also available as [HTML](/p/3f-ul-gear-tyvek-bivy-mummy).

Category: [Sleeping accessories](/c/sleep/sleeping-accessories.md) · [Sitemap](/sitemap.md)

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