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SUL 1.5 Down Sweater

(2 customer reviews)

$280.00

This is a made-to-order item. Not in stock. See the home page for the made-to-order lead time.

Available on backorder

Adds approximately 20 grams
Pockets often cause loft compression and add a cold spot. Weight placed in them puts tension on the shells, which compresses the loft that insulates. These pockets are designed to limit this effect, by suspending the weight from critical points, but they can't eliminate it. The wearer should be aware of pocket weight and shell tension. These add approximately 6 grams. They have a vertical side opening with two snaps to close. The openings go through to large internal pockets.
Titanium Grey
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Select a size. The dimensions listed are the garment dimensions, not body measurements. Fully read the applicable sizing page and follow all procedures. If desired garment dimensions are not shown here, fill in the custom sizing box. Size based returns are not accepted. However, post sale modification may be available at an hourly rate.
XS dimensions (inches) : Shoulders - 44, Torso - 22, Back - 26, Chest - 42, Midsection - 40, Hips - 38, Arm - 25, Arm hole - 22, Bicep - 15, Neck - 25
S dimensions (inches) : Shoulders - 47, Torso - 24, Back - 28, Chest - 46, Midsection - 44, Hips - 42, Arm - 27, Arm hole - 23, Bicep - 15.5, Neck - 25
M dimensions (inches) : Shoulders - 52, Torso - 26, Back - 29, Chest - 50, Midsection - 48, Hips - 46, Arm - 29, Arm hole - 25, Bicep - 16.5, Neck - 25
L dimensions (inches) : Shoulders - 56, Torso - 28, Back - 32, Chest - 53, Midsection - 52, Hips - 50, Arm - 31, Arm hole - 26, Bicep - 17, Neck - 25 (+$15.00)
XL dimensions (inches) : Shoulders - 58, Torso - 30, Back - 34, Chest - 57, Midsection - 55, Hips - 54, Arm - 33, Arm hole - 28, Bicep - 19, Neck - 25 (+$15.00)
If you would like a custom fit, enter the desired garment dimensions here. Please enter all of them or select a stock size and enter the specific dimensions you would like to change here. Do not enter body measurements. Not all requests can be accommodated. Size based returns are not accepted. However, post sale modification may be available at an hourly rate. Questions should not be entered here.
Questions should not be entered here.
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The SUL (super ultralight) series garments are aimed at pushing weight as low as possible for a given fill amount, without compromising function. They are down sweaters in the strictest sense. Like a knit sweater, no zippers, no pockets, no linings, no webbing, just insulation in the form of down in a nylon shell. Now available with zippers and pockets.

Fill type – 900fp Hyperdry goose down

Fill weight (approximate) – 3.4oz (small), 3.8oz (medium)

Total weight (approximate) – 5.6oz (small), 6.4oz (medium), 7.9 (medium, hood)

The goal with the SUL 1.5 down sweater was to make the lightest jacket possible for solid 4 season use. It gets the same shell as the SUL .75 and SUL 1.1, except the baffle spacing is increased to 6″ to limit cold spots and maximize loft. Calculated loft is increased to 1.5. It’s incredibly warm with over 1.5″ of loft between baffles and very few cold spots. I estimate this as full winter level warmth. Comfort range well below freezing. It has a cinch at the neck and a cinch at the bottom hem to keep out drafts. Both cords are removable. An SUL 1.5 has a lot of loft. One should plan on adding room for that loft in the fit. When in doubt, oversize. A snug and fitted puffy is cold. A loose fitting puffy is warmer and usually ends up covering more of your body.

A puffy is most often used as an inactive layer for stops, at camp, or to help boost a sleep system. They don’t make for very good active layers since your sweat can easily compromise the down fill. This makes a zipper for ventilation a somewhat frivolous feature that can add a significant amount of weight and bulk. Pockets can be nice to have, but they often add a big chunk of weight and bulk and compromise the performance of a jacket by creating cold spots and by pulling insulation flat when there is weight in them. For those wanting pockets to warm hands I recommend adding a few inches to the sleeve to cover your hands. This is lighter than pockets and doesn’t compromise the overall warmth. All non-essential sewn through lines have been eliminated so the down can loft and cold spots are reduced. Simplicity and reduced weight and bulk are not the only benefits of all this. Leaving off many tedious features also reduces my labor and allows me to offer a very affordable jacket at an extremely low weight.

It’s meant to be used with a modular hood or head insulation, but can be built with an integrated hood on request.

More warmth out of less fill Sewn Through Baffle Construction and Its Effect on Warmth – Timmermade

These are now available with zippers and pockets, but one should expect each of these to reduce the effectiveness of these garments. The zipper isn’t too bad, but it’ll increase the cold spot in front, and add a chunk of weight. The pockets will add two big cold spots on the sides and placing weight in them can cause shell tension and loft loss. The design of them is intended to limit this effect, by attaching the pocket to points that transfer load up to places that already have sewn through spots. However, it is inevitable that weight will still pull some loft flat. The wearer should be aware of this tendency to try to limit the weight placed on the shells. Storing light things and warming your hands with them supported by something other then the pocket will be less detrimental.

Weight 0.2 kg

2 reviews for SUL 1.5 Down Sweater

  1. Ethan P.

    I purchased this sweater with the attached hood nearly a year ago and have loved it ever since. It has managed to transcend being a key item on my lighter pack to being a daily winter jacket. Alone it does a stellar job of keeping me warm at temperatures of 25-40 ˚F. When paired with an additional layer and windbreaker I have been able to enjoy temperatures below 0 ˚F comfortably.

  2. Jessica G (verified owner)

    Took this on the PCT in 2023 with an added zipper and loved it. Wore it to sleep in the Sierra with -8 C temps and was very comfy (also paired with Timmermade 20F quilt, alpha fleece, lightweight wind jacket, and sun hoody). I was nervous about the lack of pockets but Dan is right in that the longer sleeves work well for keeping hands warm. I now also bring this on ski trips. Wearing it makes me feel like I’m wrapped in my down quilt. 100% recommend.

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