Big Agnes Sweetwater UL 43L Backpack

Sweetwater UL 43L—ultralight, durable, and comfortable backpack for fastpacking adventures

What Our Gearhead® Experts Are Saying:

"The Sweetwater is perfect for fastpacking or overnight trips. It fits like a dream thanks to its running-vest-inspired harness and load lifters. The recycled nylon is tough enough for rugged trails, and the included rain cover is a huge plus for unpredictable weather."

Set the pace with the Sweetwater UL 43L, an ultralight backpack that prioritizes fit, comfort, and durability. Designed with a running-vest-style harness, this pack hugs the chest, back, and shoulders for a secure carry, even on dynamic trails. Its proprietary Load Wrangler Plus system transfers weight from shoulders to hips, while adjustable straps and an anatomical back panel ensure stability and comfort. Built with ultralight recycled regen nylon made from discarded fishing nets, the Sweetwater UL 43L offers eco-conscious performance without compromise. A spacious main compartment with an expanding spindrift collar accommodates overnight essentials, while oversized stretch-mesh pockets provide quick storage for on-the-go access. An integrated rain cover from recycled materials offers extra weatherproofing for those unexpected trail showers.

Details

• Lightweight 43L backpack ideal for overnight or fastpacking trips
• Running-vest-style harness distributes weight for a secure, comfortable fit
• Made with recycled nylon and other earth-friendly, abrasion-resistant materials
• Oversized stretch-mesh stash pockets on front, sides, and chest straps
• Internal reservoir sleeve fits up to 3L for hands-free hydration
• Includes removable rain cover made from ultralight recycled materials
• Expanding spindrift collar adds extra storage when needed; compatible with 9-inch diameter bear canisters
• Item #BAGZ2FQ

Tech Specs

Responsible Collection

Recycled/Repurposed

Material

[face fabric] regen ocean robic nylon ripstop from recycled fishing nets, [lining] recycled nylon ripstop, UTS coating, silicone coating

Volume

[small] 38L (2319cu in), [medium] 43L (2624cu in), [large] 44L (2685cu in)

Support/Suspension

integrated frame system, Load Wranger Plus

Shoulder Straps

running vest-style harness

Waist Belt

Open Range hip belt

Hydration Compatible

internal sleeve (3L)

Access

top

Pockets

1 stretch mesh front, 2 stretch mesh side, 2 stretch mesh harness

Trekking Pole Carry

yes

Rain Cover

included, recycled nylon ripstop

Compression

side bungee straps

Dimensions

[medium] 28 x 12 x 9.5in

Claimed Weight

2lb 10oz

Activity

ultralight backpacking, backpacking

Manufacturer Warranty

limited