The PHD Yukon Down Pullover features 900 fill-power down and baffled construction.
PHD (Peter Hutchinson Designs) Mountain Software is a small company in Stalybridge, UK that manufactures sleeping bags and garments “from the lightest in the world to the ultimate in extreme expedition protection.” Many of their garments are offered in standard sizes, or custom sizing, added fill, or custom features at additional cost. All products are sewn in their small factory after the order is placed.
This review covers their baffled Yukon Down Pullover (also available as a jacket with a full-height front zipper), which is designed to provide maximum warmth with minimal weight. Is this the ultimate ultralight down garment for cold weather pursuits?
The PHD Yukon Down Pullover features 900 fill-power down, which PHD tests on-site to be sure it meets or exceeds their specifications. One ounce of down of this quality expands to 900 cubic inches (14.7 liters), so a relatively small weight of down produces a very puffy jacket. The jacket has box wall baffled construction and 4-inch (10-cm) down chambers. PHD does not disclose the amount of down fill in the jacket. I measured the jacket’s average double layer loft at 3.75 inches (9.5 cm).
Front and rear views of the PHD Yukon Down Pullover. The Yukon, designed as a lightweight cold weather garment, has a few features beyond the minimum: a detachable hood, fleece-lined collar, #5 front and pocket zippers, and a drawcord hem.
The outer shell is PHD’s Drishell fabric, which is 1.68 oz/yd2 (57 g/m2) ripstop nylon with DWR, claimed to provide “total wind resistance, high breathability, and effective water resistance”. Its functionality is similar to shell fabrics used in the Western Mountaineering Flash XR Jacket and the Montane Anti-Freeze Jacket. The lining is PHD’s MX Microfiber nylon ripstop which, at 0.88 oz/yd2 (30 g/m2), is one of the lightest downproof fabrics currently available. MX is calendared on both sides (more on the inside) to increase strength, wind resistance, and downproofness.
The Yukon Down Pullover is featured for lightweight four-season use, i.e., it adds some essentials for cold weather comfort and convenience. It has a detachable hood (1.8 oz/51 g) that attaches with five snaps. The front zipper is a 12-inch (30-cm) YKK #5CN coil zipper, rather than the #3 zipper found on the three-season PHD Ultra Down Pullover. The hood and cuffs have a simple elastic binding, but the hem has an elastic drawcord with two adjustors to seal out drafts. There is one large reach-through front pocket, with zippered openings, that provides loads of room inside to hold an assortment of items.
The front reach-through pocket (left) is full width and high volume. There is a zippered security pocket (right) inside on the right side.
The hood is attached with five snaps and is removable; it has a simple elastic binding on the front plus two under-chin snaps.
I tested the PHD Yukon Down Pullover on a number of fall backpacks in the southern Colorado Rockies, plus winter skiing and snowshoeing (even ice fishing) over a five-month period. Temperatures ranged from +30 to -15 F (-1 to -26 C). I typically wore the pullover in camp, in my sleeping bag on cold nights, and while hiking or skiing on frigid days.
I normally wear a men’s size Large and found the sizing of the Yukon Down Pullover to be perfect. It’s roomy enough inside to wear over a baselayer plus a thin insulating layer, and the sleeves are extra long. The fit around the face, at the neck, and at the wrists is snug but not tight; the hem is snugged with a drawcord. The dropped tail covers the butt somewhat (see photos above) but the garment is not extra long in the body. I personally like a pullover style, but I must admit it is not as convenient to put on as a jacket style. The Yukon Jacket version of this garment has a full-height front zipper and weighs 1.1 ounces (30 g) more, and many users will feel that it is worth the extra weight.
For cold weather camping, the PHD Yukon Down Pullover paired with the PHD Minimus Down Trouser (8 oz/227 g) is a warm and lightweight combination, weighing about 1.5 pounds (680 g), providing plenty of comfort in camp, and extending the warmth of an ultralight sleeping bag by 10-15 F (6 to 8 C). I have found that wearing an ultralight rain jacket and pants over my insulating layers noticeably increases their warmth in camp, and have been known to wear my raingear inside my sleeping bag on really cold nights to stay warm.
PHD claims a comfort temperature for the Yukon Pullover of +5 F (-15 C). I found that to be accurate when physically active, but, for inactive conditions, I needed a couple of layers under it and a shell over it to stay warm. For skiing or snowshoeing, the jacket is simply too warm to wear while climbing, but it’s perfect to wear during breaks and downhill runs on frigid days.
In wind and snow, I found the Yukon provided superb protection from the elements. While skiing on frigid days with a biting wind, the Yukon kept me toasty warm. I deliberately wore it as an outer layer on snowy and rainy days to test its water resistance; it stayed completely dry inside, and the shell fabric did not wet out.
Unfortunately, PHD’s Drishell at 1.68 oz/yd2 (57 g/m2) is not very light. It weighs more than twice as much as the new Pertex Quantum GL (about 0.7 oz/y2/27 g/m2), which is considered to be the current state-of-the-art material for lightweight shell fabric (MontBell’s 7 denier Ballistic Airlight fabric is equal in light weight and quality). While Drishell is heavier, it is also clearly more durable and weather-resistant. The fabric itself contributes significantly to the garment’s warmth and dryness, which should not be discounted.
I tested the jacket’s waterproofness by placing a puddle of water on the shell for an hour (left), then checking for leakage. No water soaked through the fabric or seam, verifying PHD’s claim of high water resistance. From my home and field tests, I conclude that PHD’s Drishell provides superb weather resistance and durability.
The following table compares specifications of jackets similar to the PHD Yukon Down Pullover. All jackets have lightweight shell fabric, premium down insulation, and baffled construction. Manufacturer data for size Medium are shown.
|Jacket||Shell Fabric||Insulation||Features||Weight oz (g) size Medium||Cost|
|PHD Yukon Down Pullover||Drishell ripstop nylon with DWR 1.68 oz/yd2 (57 g/m2)||900 down||Half-zip, reach-through front pocket, zippered security pocket, elastic cuffs and hem||15.0 (420)||£245 (approx. US$334 without VAT)|
|PHD Yukon Down Jacket||Drishell ripstop nylon with DWR 1.68 oz/yd2 (57 g/m2)||900 down||Full-height front zipper, plus above features||15.9 (450)||£255 (approx. US$348 without VAT)|
|Nunatak Skaha Plus Pullover with Front Pocket||Pertex Quantum 0.9 oz/yd2 (30 g/m2)||800 down||Half-zip, drawcord hood and hem, elastic cuffs||10.5 (298)||US$412|
For light weight, the hooded Nunatak Skaha Plus is hard to beat at 10.5 ounces (298 g), but the cost is about US$100 more. The Skaha Plus apparently attains its lighter weight by using lighter shell fabric, a lighter front zipper, and no pocket zippers. In defense of their using “only” 800 fill down, Nunatak stresses that down quality varies a lot by source, and they use the highest quality down available.
Other than the manufacturer data presented in the table, I have no additional information (such as fill weight and loft) to compare the garments. I have not personally tested any of the other garments in the table, so I can’t comment any further on how well they compare.
Without data on fill weight and loft, it is difficult to compare the warmth of the PHD Yukon Down Pullover (or jacket) with the Nunatak Skaha Plus. There are a limited number of lightweight baffled down jackets on the market, and their weights vary over a fairly wide range. And the lightest jacket isn’t necessarily the warmest. Warmth ultimately depends on the amount and quality of down in the jacket; and light weight comes from high lofting down and minimalist fabrics and features. The Nunatak Skaha Plus seems to be the most minimalistic, but the down fill-power, by the numbers, does not compare well. PHD verifies the fill-power of their down, but they do not disclose the amount of down in the jacket. My double layer loft measurement of 3.75 inches (9.5 cm) is good, and my personal testing of the Yukon Pullover verifies that it is quite warm.
All of the jackets listed in the table are high-end baffled jackets with premium down and cost in the US$350-425 range. An alternative is to look at premium stitched-through jackets, such as the Rab Infinity Jacket and GoLite Bitteroot Jacket. Both have 850 fill down, a Pertex Quantun GL shell and lining, and attached hood. The Rab Infinity weighs 18 ounces (510 g), contains 7.4 ounces (210 g) of down, and sells for US$280 (that’s a great value); the GoLite Bitterroot (fall 2011) will weigh 13.1 ounces (371 g), contains 5.3 ounces (150 g) of down, and will sell for US$375. Another notable stitch-through jacket is the Western Mountaineering Meltdown (850+ down/17 oz/482 g/US$340), which has a microfiber shell. And of course there is the WM Flight Jacket (4.7 ounces/133g of 850+ down/10.5 oz/ 298g/US$250). Although these stitched-through jackets are not directly comparable to the jackets in the table, some of them are a lower cost alternative, and their warmth can be comparable to a baffled jacket if you wear a shell over them (for details read my article Lightweight 3-Season Down Jackets State of the Market Report). The referenced article also provides fill weight, loft, and other data for a large number of ultralight down jackets.
Overall, the PHD Yukon Down Pullover (and jacket) appears to be in the ball park for weight, warmth, and pricing for a baffled garment. It could be made a bit lighter by offering a lighter shell fabric, using a #3 zipper on the front, eliminating the pocket zippers, and lightening the hem drawcord. That would eliminate 2-3 ounces (57-85 g), but would make the jacket more fragile for four-season use. The Yukon is a balancing act of durability, functionality, warmth, fit, and weather resistance. From our perspective, it’s not as lightweight as it could be; but from a mountaineer’s perspective, it is spot on. Perhaps PHD should offer an ultralight version of this pullover, and perhaps they should consider using Pertex Quantum GL fabric. As it is, the Yukon does not stand out from a lightweight perspective.
Specifications and Features
|Manufacturer||PHD Mountain Software (http://www.phdesigns.co.uk/)|
|Year/Model||2010 Yukon Down Pullover|
|Fabrics||Outer shell: 1.68 oz/yd2 (57 g/m2) Drishell with DWR finish|
Lining: 0.88 oz/yd2 (30 g/m2) MX Microfiber mini-ripstop nylon, calendared both sides
|Insulation||900 fill-power down|
|Loft||Measured two-layer loft is 3.75 in (9.5 cm)|
|Features||Box wall baffled construction with 4-inch (10-cm) horizontal chambers|
Down filled stand up collar with fleece lining
Detachable hood (5 snaps) with elastic binding
12-inch (30-cm) front #5CN YKK coil zipper with one slider and storm flap under zipper
Reach-through front pocket with zippered openings and zippered security pocket inside
Stretch drawcord hem with two adjustors
2.5-inch (6.4-cm) dropped tail
Stuff sack included
|Weight||Size Large tested|
Measured Weight: 15.8 oz (448 g)
Manufacturer Specified Average Weight: 15.0 oz (420 g)
|MSRP||£245 (approx. US$393) |
Price includes VAT; if the item is to be delivered outside the EU, VAT does not apply and 15% is deducted from the price
Disclosure: The manufacturer provided this product to the author and/or Backpacking Light at no charge, and it is owned by the author/BPL. The author/Backpacking Light has no obligation to review this product to the manufacturer under the terms of this agreement.