Deuter Aircontact Core 55+10 SL vs Deuter Aircontact Ultra 45+5 SL
Quick take: The Deuter Aircontact Ultra 45+5 SL costs $5 less; the Deuter Aircontact Core 55+10 SL carries more (65 vs 50 liters); the Deuter Aircontact Ultra 45+5 SL is lighter (2.67 vs 4.98 lbs).
Which one to buy
Fit stops being a deciding question here, which is rare. Both are Deuter's women's SL builds on the same 35-56 cm back-length range, both cost about $300, and both keep a removable lid and Air Spacer mesh. What separates them is a weight gap of more than two pounds and the loads each frame was built for.
The Ultra 45+5 SL weighs 2.67 lbs on a spring-steel perimeter frame, which is rare: most ultralight makers offer a women's fit only as a smaller size run, not a women's-specific harness. Its 26-33 lb rating is the honest working range, and 50 L is easy to overfill past it. The roll-top plus lid is fiddlier than a plain top-loader, Deuter does not publish bear-canister fit, and the line is newer, so its track record is shorter than the cottage brands it competes with.
The Core 55+10 SL weighs 4.98 lbs and carries 22-44 lbs on an aluminum Y-frame, with reviewers of the Core line reporting loads around 40 lbs over steep terrain carried well. It has more volume, a U-shaped front zip, a separate bottom compartment and 500D face fabric that shrugs off abrasion where the Ultra's 175D will eventually meet sharp rock. Its foam-rib back runs warm in hot weather, and like the Ultra it ships without a rain cover. The 33 lb line is the whole decision: under it, the Ultra saves two pounds for the same money, and every shoulder-season trip with winter layers and long food carries lands you over it.
Deuter Aircontact Core 55+10 SL
For women carrying 33-44 lb loads, or anyone who wants front-zip access and tougher fabric more than a lighter pack.
Deuter Aircontact Ultra 45+5 SL
Best if your full load stays under 33 lbs and you want the lightest framed women's-fit pack Deuter makes.
| Spec | Deuter Aircontact Core 55+10 SL | Deuter Aircontact Ultra 45+5 SL |
|---|---|---|
| Price | $300 | $295 |
| Rating | — | — |
| Type | Traditional Pack | Ultralight Pack |
| Frame Type | Internal Frame | Internal Frame |
| Capacity | 55+10 L | 45+5 L |
| Weight | 4.98 lbs | 2.67 lbs |
| Max Load | 22-44 lbs (10-20 kg) | 26-33 lbs (12-15 kg) |
| Torso Fit | VariClick 5-stage, 35-56 cm (13.8-22 in) | Clip & Loop, 35-56 cm (13.8-22 in) |
| Material | 500D PA textured with 235D recycled PA plain weave | 175D PA ripstop Ultra HD |
| Back Panel | Aircontact with Air Spacer mesh and aluminium Y-frame | Aircontact with Air Spacer mesh over spring steel round-profile frame |
| Adjustable torso | Yes | Yes |
| Ventilated back | Yes | Yes |
| Raincover included | No | No |
| Hipbelt pockets | No | No |
| Removable lid | Yes | Yes |
| Hydration sleeve | Yes | Yes |
| Fits BV500 bear can | No | No |
| Warranty | Deuter lifetime repair policy | Deuter lifetime repair policy |
Pros & cons
Deuter Aircontact Core 55+10 SL
- ✓The 35-56 cm back range starts a full 7 cm shorter than the men's Core, which matters for torsos that bottom out the adjustment on unisex packs.
- ✓SL shoulder straps are shaped and spaced for a narrower shoulder and chest rather than being a shortened copy of the men's strap.
- ✓Carries the same 10-20 kg rating and the same aluminium Y-frame as the standard Core, so the women's fit costs nothing in load capacity.
- ✓At 2,260 g it is actually 50 g lighter than the men's 50+10 while carrying 5 L more.
- ✓The U-shaped front zipper and separate bottom compartment carry over unchanged from the standard Core.
- ✓VariFlex hip fins pivot independently, which suits the greater hip-to-waist differential the SL fit is designed around.
- ✓Available in a 45+10 at $280 for shorter trips or smaller frames, so the fit is not tied to one volume.
- ✓Covered by the same lifetime repair policy as the rest of the Deuter line.
- ✗Only two SL volumes are offered in the US, against a much deeper women's range from Osprey's Ariel and Gregory's Deva.
- ✗At $300 it costs $20 more than the men's 50+10 for the same construction.
- ✗The 2,260 g weight is high next to women's-specific ultralight options like the Gregory Facet 55.
- ✗The foam-rib back panel ventilates less than a suspended-mesh design, which is the usual complaint in hot weather.
- ✗No rain cover included, matching the standard Core and unlike the Pro.
- ✗The 55+10 badge overstates usable volume unless the collar is extended.
- ✗SL-specific stock is thinner at US retailers, so colours and sizes sell out earlier.
Deuter Aircontact Ultra 45+5 SL
- ✓1,210 g in a women's fit is exceptionally light for a pack with a frame and an adjustable back length.
- ✓Both SL sizes have published weights, so the 35+5 at 1,140 g is a quantified option for shorter trips.
- ✓The 35-56 cm Clip & Loop range is properly short at the bottom end rather than a capped men's range.
- ✓Most ultralight packs offer women's fit only as a size run, so a genuinely SL-specific carry is rare here.
- ✓Roll-top plus removable lid gives the same strip-down flexibility as the men's version.
- ✓175D ripstop Ultra HD is a real fabric upgrade over the Aircontact Lite's 140D.
- ✓Spring-steel perimeter frame keeps load on the hips at a weight where many packs give up and go frameless.
- ✓Lifetime repair policy, which almost no cottage ultralight brand matches.
- ✗12-15 kg ceiling is the binding constraint, and 50 L can be loaded past it easily.
- ✗$295 is the same as the men's 50+5 for 5 L less capacity.
- ✗Only 60 g separates it from the men's version, so the choice is entirely about fit rather than weight.
- ✗Reduced back panel ventilates less than the suspended-mesh Futura Air Trek.
- ✗Roll-top and lid together are fiddlier than a simple top-loader.
- ✗Newer to market than the cottage ultralight packs it competes against.
Deuter Aircontact Core 55+10 SL vs Deuter Aircontact Ultra 45+5 SL: common questions
Do the Core SL and Ultra SL fit the same?▾
Both adjust across 35-56 cm with women's-specific harness geometry, though the Core uses VariClick's five stops and the Ultra uses Clip & Loop. If one fits your torso, the other should come close, so the decision is about load and weight.
Can the Aircontact Ultra 45+5 SL handle a week-long trip?▾
Volume is not the limit; the 26-33 lb rating is. At 50 L it is easy to load past what the frame wants, so a week of food on top of a normal kit belongs in the Core SL, which is rated to 44 lbs.
Which holds up better on rough ground?▾
The Core SL's 500D face fabric is the tougher of the two. The Ultra's 175D ripstop is a step up from the Aircontact Lite's 140D, but it will eventually lose to sharp granite. Deuter's lifetime repair policy covers either.