Fly Creek UL 25 (850 RDS DownTek) REGULAR +2 - Big Agnes

Big Agnes Fly Creek UL 25 – Sleeping bag for ultralight adventures

The Big Agnes Fly Creek UL 25 is an ultralight sleeping bag designed for those who want high comfort with minimal packing volume. With smart material choices, technical design and low weight, this is an optimal three-season bag for hiking, fastpacking and thru-hiking.

The sleeping bag is filled with 850 fill power DownTek™ down – a PFC-free, bluesign®-approved down that maintains its insulating properties even in wet conditions. The outer and inner fabric are made of NetPlus® 10D nylon ripstop – a durable material made from recycled fishing nets, treated with a PFAS-free water-repellent finish.

The Fly Creek UL 25 features Big Agnes' unique Diamond Quilting construction in the upper, which reduces seams and prevents down movement. The ergonomic mummy shape with generous foot box and insulated zipper maximizes the sleeping bag's thermal efficiency without compromising comfort.

With a weight of only 722 grams, ISO comfort temperature of 2°C and compressible size of 20 × 24 cm, this is a technical sleeping bag that meets the demands of the most demanding outdoor enthusiasts.

Properties

Ultralight NetPlus® fabric made from recycled fishing nets

850 fill power DownTek™ PFC-free down

Diamond Quilting minimizes weight and maximizes insulation

Ergonomic foot box for increased comfort and warmth

Mummy shape for efficient heating and weight saving

Insulated zipper and thermal collar

Half-length center zipper for temperature regulation

Anti-snag #3 zipper for smooth use

Mesh storage bag and packing bag included

Technical specification

Weight: 722g

Comfort temperature (ISO): 2 °C

Limit temperature (ISO): –4 °C

Filling: 850 fill power DownTek™ PFC-Free

Filling weight: 482 g

Compressed size: 20 x 24 cm

Maximum body length: 183 cm

Shoulder width: 152 cm

Hip width: 137 cm

Foot width: 91 cm

The Fly Creek UL 25 is an obvious choice for those looking for a high-performance sleeping bag that combines light weight, durable materials and technical functionality. Ideal for demanding tours where every gram counts.