Ultra Circuit SV 48 Rucksack

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UOG TOP PICK – for Rugged Minimalist Carry: With Ultra fabric toughness, dialled-in comfort, and just enough space for refined kits, the Ultra Circuit SV 48 is built for hikers who go light but don’t go easy.

Ultralight Adventure Equipment says: 

You’ve asked, and we’ve delivered! The Ultra Circuit SV (Small Volume), is identical to our award winning Ultra Circuit backpack, but with a sleeker smaller volume. This super lightweight and reliable workhorse is backed by a lifetime guarantee. Designed for hikers who crave a sleeker profile without compromising performance, this pack is for those who find their current pack a little too roomy. The Ultra Circuit SV is perfect for 3-5 nights out for those with their gear dialed in. Or, if you need a little extra storage, the removable Top-Y and Bottom strap-system (sold separately) can help customize your on-trail experience.

Why Ultra? 15x stronger than steel by weight, twice as abrasion resistant as standard 420D nylon, and waterproof to 200 psi, we’ve finally found an ultralight fabric that matches our high standards. Front pocket is ULTRA StretchMesh for added abrasion resistance. Note that to maximize water-resistance of the ULTRA Circuit, these packs do not have bladder hose ports.

Hikers everywhere agree; Whether you’re a weekend warrior, L.A.S.H.er, or thru-hiker, the Ultra Circuit SV will keep you moving freely. It’s the perfect balance of rugged durability, weight capacity, and weight savings in a comfortable long-hauler. The Ultra Circuit SV is a top choice for hiking any long-distance backpacking trail like the Pacific Crest Trail, Continental Divide Trail, Appalachian Trail and beyond.

Ready to take your adventures to the next level? The Ultra Circuit SV is here to be your trail companion. Explore lighter, hike farther, and embrace the journey!

Our Verdict

ULA has taken the popular Circuit SV and stepped it up with Ultra fabric, bringing serious abrasion resistance and waterproofing without tipping the scales. At just 1027g (medium torso and medium hipbelt), it’s built for committed hikers who want maximum durability. 

Fit and carry are still standouts here. The internal hoop frame and contoured straps handle 16kg well, and the adjustability means you can fine-tune it to your shape with ease. The UltraStretch mesh front pocket is perfect,  much tougher than traditional mesh but still stretchy enough to cram in layers or camp shoes. Large hipbelt pockets are functional, fitting a phone, snacks or gloves with room to spare.

It would be suitable for long-distance trails, short fastpacks, or any trip where you need reliable carry in a small-volume pack. If you’ve already dialled your kit and want something that can take a beating, the SV won’t hold you back.

– Reviewed by Ultralight Outdoor Gear

Features

• Framing System comfortable for up to 35 lbs
• ULTRA 400X & ULTRA 200X Fabric
• Ice Axe & Trekking Pole Loops
• Fits BV500 vertically inside 
• Height Adjustable Torso 
• Interchangeable Hip-belt 
• Load-lifters 
• Larger Hip-belt pockets than most of the industry 
• Padded back panel 
• UltraStretch Mesh 
• Standard Top Strap 
• Internal Suspension Hoop 
• Padded Backpanel 
• Contoured Shoulder Straps 
• Front Shock Cord
• Rolltop Closure
• Side Compression Straps

Specifications

• Medium Torso Length Weighs: 806g
• Large Torso Length Weighs: 847g
• Small Hipbelt Weighs: 204g
• Medium Hipbelt Weighs: 221g
• Large Hipbelt Weighs: 231g
• Max load: 35 lbs / 16 kg
• Pack straps: J-strap

Volume breakdown

• Main body (with extension collar): 2,258 CI / 37 L
• Front mesh pocket: 214 CI / 3.5 L
• Left side pocket: 122 CI / 2 L
• Right side pocket: 122 CI / 2 L
• Left hipbelt pocket: 91.5 CI / 1.5 L
• Right hipbelt pocket: 91.5 CI / 1.5 L
• Pack total volume: 2,929 CI / 48L

Size breakdown

• Medium torso: 18″-21″
• Large torso: 21″-24″
• Small hipbelt: 30″-34″
• Medium hipbelt: 38″-38″
• Large hipbelt: 38″-42″

Material & Construction

• ULTRA™ 200X: ULTRA 200X is constructed with a 200d face Ultra-PE blended with high-tenacity polyester, an Ultra-PE CrossPly, and a 0.75 mil film backing. Weight: 3.9oz/yd² Tear Strength: Warp: 103.1 lb / Fill 133.2 lb. Abrasion Resistance: 4,400 cycles.
• ULTRA™ 400X: A high modulus pack fabric, ULTRA 400, is constructed of a 400d Ultra PE blended with hight-tenancy polyester, Ultra-PE Cross-Ply, and a 0.75 mil film backing. It is 20% lighter and four times as abrasion-resistant than other 400d U-PE fabrics. Weight: 5.25 oz/yd², 178 gsm. Tear Strength: Warp: 187.7 lb/ Fill 161.1 lb. Abrasion Resistance: 8,800 cycles.

Help & advice:

• The Ultimate Guide to Choosing an Ultralight Rucksack
• Time-Saver Guide to Choosing a Rucksack