---
title: "Big Agnes Fly Creek UL 25 Sleeping Bag"
name: "Big Agnes Fly Creek UL 25 Sleeping Bag"
brand: "Big Agnes"
description: "Well-designed Big Agnes Fly Creek UL down sleeping bag is filled with high-quality goose down with a fill power of 850 cuin and a hydrophobic treatment."
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last_updated: "2026-10-13"
---

# Big Agnes Fly Creek UL 25 Sleeping Bag

Brand: Big Agnes · Category: [Sleeping bags](/c/sleep/sleeping-bags.md)
Sleeping bag size: Long, Regular · Zipper position: Center · Chamber design: Baffled construction, Big Agnes signature diamond quilting

## Offer

- Price: €476.70
- Availability: In stock
- Condition: New
- Buy on the website: [HTML product page](/p/big-agnes-fly-creek-ul-25-sleeping-bag)

## Description

Well-designed Big Agnes Fly Creek UL down sleeping bag is filled with high-quality goose down with a fill power of 850 cuin and a hydrophobic treatment. It's constructed from an extremely lightweight and water-repellent material made from recycled fishing nets. This is a versatile three-season sleeping bag that you can pack down to a small, compact size.

## Why is the product special?

Premium, ultralight, and easily packable three-season down sleeping bag for minimalists.

## Materials

The Big Agnes Fly Creek UL 25° sleeping bag is made from high-quality materials that ensure **low weight**, **high insulation**, and **moisture resistance**. The total weight of the bag is **722 grams** in the Regular size and **799 grams** in the Long size.

**Insulation**: High-quality **goose down with a fill power of 850 cuin** (482 grams of down in Regular size and 539 grams in Long size), treated with **DownTek™ PFC-Free technology**, which keeps its insulating properties even in wet conditions. This treatment uses PFAS-free water-repellent technology approved for outdoor use by [bluesign®](https://www.bluesign.com/en/), while also meeting strict ethical and environmental certification [RDS](http://responsibledown.org/) standards.

**Outer and inner material**: Ultralight **10D ripstop nylon NetPlus®**, made from recycled fishing nets. This eco-friendly material is not only gentle on the environment but also extremely lightweight, strong, durable, and pleasant to the touch. Plus, it has a **PFAS-free water-repellent treatment** that helps protect the sleeping bag from moisture and dirt.

The sleeping bag is designed for **three-season use**, its comfort temperature (according to ISO 23537 standard) is 2°C, and the limit temperature is -4°C.

## Construction

Thanks to its technically refined design, the Fly Creek UL 25° ranks among the most efficient ultralight sleeping bags on the market.

- **Mummy shape** – thanks to the minimized internal volume, the sleeping bag heats up faster and retains warmth more efficiently.
- **Big Agnes Signature Diamond Quilting** (top side) – innovative stitching that minimizes down migration and enhances the loft of your sleeping bag, while using fewer seams than traditional quilted bags, which reduces weight and increases durability.
- **Baffled construction** (bottom side and sides) – improves down distribution and eliminates cold spots.
- **Ergonomic design in the footbox** – the shaping of the lower part of the sleeping bag allows for better loft and more room for your feet, which increases thermal comfort and prevents down compression in this critical area.

## Features

- **Half central zipper** – the shorter zipper in the middle of the sleeping bag lets you easily regulate the temperature while saving weight.
- **Insulated zipper flap and collar against heat loss** – they prevent heat from escaping and boost the thermal efficiency of your sleeping bag.
- **Minimalist hood with low-profile adjustment** – provides optimal thermal insulation without restricting breathing space. The adjustment system is made from renewable materials sourced from organic waste.
- **Very compact packing** – thanks to premium materials and high down fill power, the sleeping bag compresses to minimal dimensions, which you'll appreciate if you need to save space in your backpack.

## Accessories

With the Big Agnes Fly Creek UL 25° sleeping bag, you also get:

- **Mesh storage sack for long-term storage** – helps maintain the down loft and extends its lifespan.
- **Smaller stuff sack** – lets you minimize the volume of your sleeping bag in your backpack. Its dimensions are 19 x 38 cm, with a volume of 10 liters.

If you're looking for a waterproof compression bag to pack your sleeping bag into even smaller and more compact dimensions, we recommend checking out [STS eVac Compression Dry Bag](/p/sea-to-summit-evac-compression-dry-bag) or even lighter [STS eVac Compression Dry Bag UL](/p/sea-to-summit-evac-compression-dry-bag-ul).

## Specs

- Color: Black / Purple
- Sleeping bag size: Long, Regular
- Zipper position: Center
- Chamber design: Baffled construction, Big Agnes signature diamond quilting
- Season: 3-season
- Comfort temperature: 2 °C
- Limit temperature: -4 °C
- Down weight: 482 g
- Fill power: 850 cuin
- Down type: Goose
- Hydrophobic down: Yes
- Insulation type: Down
- Material: 10D ripstop nylon NetPlus
- Packed dimensions: 38 × 19 cm
- Stuff sack volume: 10 l
- Ankle width: 46 cm
- Hip width: 69 cm
- Shoulder width: 76 cm
- Weight: 754 g
- Woocommerce product id: 136541
- Brand: Big Agnes

## Variants

- Big Agnes Fly Creek UL 25° – Regular · SKU BFCULR2525 · EAN 841487150150 · €476.70 · In stock · Black / Purple, Regular
- Big Agnes Fly Creek UL 25° – Long · SKU BFCULL2525 · EAN 841487150167 · €506.20 · Out of stock · Black / Purple, Long

## Related

- [Patizon G 1100](/p/patizon-g1100.md)
- [NEMO Switchback](/p/nemo-switchback.md)
- [Cumulus Teneqa 700](/p/cumulus-teneqa-700.md)
- [Therm-a-Rest Z Seat](/p/therm-a-rest-z-seat.md)
- [Cumulus Teneqa 850](/p/cumulus-teneqa-850.md)
- [Sea To Summit Reactor Fleece Liner Mummy](/p/sea-to-summit-reactor-fleece-liner-mummy.md)
- [Patizon G 800](/p/patizon-g800.md)
- [Tyvek 75x230 cm (for 1 person)](/p/tyvek-groundsheet-230-x-75-cm.md)

## Shipping and returns

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

## Images

- ![Big Agnes Fly Creek UL 25 Sleeping Bag](https://media.gramino.com/medusa/63d92e06c63817575c85bd843b49839d-01KWHVRFRGDKE58N9FJ7E86RY8.webp)
- ![Big Agnes Fly Creek UL 25 Sleeping Bag](https://media.gramino.com/medusa/4980a505726aa86a689bcdebedff3d9d-01KWHVRFWGESPKAKJ7K2S08Y39.webp)
- ![Big Agnes Fly Creek UL 25 Sleeping Bag](https://media.gramino.com/medusa/072bbc6fbbb670fd70e840354e819442-01KWHVRFWCJT3V7JMF16CGHGE2.webp)
- ![Big Agnes Fly Creek UL 25 Sleeping Bag](https://media.gramino.com/medusa/fcc1412b598084ab1d35768e2cd2abc3-01KWHVRFZ8MDC43GS50F48G59B.webp)
- ![Big Agnes Fly Creek UL 25 Sleeping Bag](https://media.gramino.com/medusa/842cf939df59a8a866a462f51afbaf0f-01KWHVRG16X123Z67Y7JSP9ZVK.webp)

## Identifiers

- SKU: BFCULR2525
- EAN: 841487150150
- Handle: big-agnes-fly-creek-ul-25-sleeping-bag
- Brand: Big Agnes

This product is also available as [HTML](/p/big-agnes-fly-creek-ul-25-sleeping-bag).

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

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