Kelty 35413711RR vs Marmot 36310

Buy the Kelty Cosmic Down 20, manufacturer part 35413711RR, ASIN B004K1D9NK, when you want the regular-length down bag whose model cell prints that part, and when you will not pick one of the two regular weights the same feature list prints. Buy the Marmot Trestles Elite Eco 20 extra wide, style 36310, ASIN B083JSFF3F, when you want the synthetic extra-wide card whose description prints 3 pounds 1.4 ounces, a 20°F bag temperature, and an EN tested comfort of 32.2°F, and when you will ignore a temperature cell that only says Comfort and a seasons cell that says All Seasons.

Short version. Kelty 35413721LR and Marmot 23520-4430-RZ are the long Cosmic and the regular 30°F Trestles, not 35413711RR and not style 36310. An Ether Light XT and a Klymit Static V are the pads under a bag. A NEMO Hornet OSMO and a Big Agnes Tiger Wall are the shelters these bags go inside. A NEMO Fillo and a Therm-a-Rest compressible pillow are head pillows, not a hood. A NeoAir XLite NXT and a NEMO Tensor are the other pad pair, still not a temperature rating for a bag.

Who should buy the Cosmic, and who should buy the Trestles?

Buy 35413711RR if you want the regular down Cosmic, the 550-fill claim in the description, the mummy shape, and the UPC 727880017323, and if you will decide which of the two regular weights on the feature list you believe by weighing the bag. Buy 36310 if you want the extra-wide synthetic Trestles, the HL-ElixR Eco insulation named in the description, the 76-inch shoulder girth, and the 3-pound-1.4-ounce line, and if you will throw out a seasons cell that says All Seasons.

Buy neither if you wanted a 0°F winter bag, a double bag, or the long Cosmic 35413721LR and the Trestles 30 that share the brand names. Buy neither if you wanted the current Cosmic Down 20 on Kelty's own page without checking the shell. That page prints recycled 20D nylon and a regular weight of 2 pounds 7 ounces. This Amazon description prints 50D polyester taffeta. Those are two generations. Do not merge them.

What is 35413711RR actually for?

This card is a Kelty Cosmic 20 degree down sleeping bag, model 35413711RR, ASIN B004K1D9NK, UPC 727880017323. The long description calls it the regular length. It prints a length of 78 inches, a shoulder girth of 62 inches, a fit to 6 feet, a fill weight of 21 ounces for regular, a 50D polyester taffeta shell, a 50D polyester taffeta liner, and 550-fill down. It also prints an EN tested lower limit of 21°F and an EN tested comfort of 32°F, and it defines comfort as the standard woman at 132 pounds and lower limit as the standard man at 176 pounds, on a 1-inch pad, in long underwear, socks, and a hat.

The feature bullets on the same card do not say that. One bullet says an EN tested comfort rating of 20°F / -7°C and a temperature rating of 20°F / -7°C. Another bullet gives short, regular, and long weights as 2 pounds 3 ounces, 2 pounds 8 ounces, and 2 pounds 12 ounces. A later bullet gives short, regular, and long as 2 pounds 7 ounces, 2 pounds 11 ounces, and 3 pounds. Regular cannot be both 2 pounds 8 ounces and 2 pounds 11 ounces. The description's EN comfort of 32°F cannot also be the feature's comfort of 20°F. Pick a sentence and name it. The current Kelty product page for Cosmic Down 20 prints a third regular weight, 2 pounds 7 ounces, a fill weight of 16.4 ounces, recycled 20D nylon, and a single 20°F rating. That page is the live manufacturer page. It is not model 35413711RR's description. If the bag in your hands has a 50D polyester shell, you have the Amazon description's generation. If it has recycled nylon, you have the current page's generation. The ASIN does not settle the fabric by itself once two documents disagree.

The description also prints a 58-inch two-way zipper, a draft collar, pad loops with the straps sold separately, and a stuff sack. Stuffed dimensions in that same description say regular and long at 8 by 15 inches, while a feature bullet says regular and long stuff size is 8 by 14 inches. That is another pair of sentences. Do not average 14 and 15.

What is 36310 actually for?

This card is a Marmot Trestles Elite Eco 20 sleeping bag, extra wide, model 36310, ASIN B083JSFF3F, UPC 889169616310. The short feature list says Nylon. The specifications say the material is synthetic, the occupancy is one person, the seasons are All Seasons, and the temperature rating is Comfort. Product dimensions on that block say 64 inches by 76 inches. None of those cells is a Fahrenheit number.

The description is where the numbers live, and it is a crowded description. It prints style number 36310, a bag temperature of 20°F and -7°C, a tested comfort of 32.2°F / 0.1°C, a tested limit of 21.6°F / -5.8°C, a product weight of 3 pounds 1.4 ounces or 1,400 grams, a shoulder girth of 76 inches, a hip girth of 71.7 inches, a footbox of 48.8 inches, a stuff sack of 18.9 by 10.2 inches, a 40D nylon lining at 1.6 ounces per yard, HL-ElixR Eco synthetic sheet insulation, a stash pocket, and a left zipper. It also says the fill is 96 percent recycled and that the bag is EN tested. Use those sentences as description sentences. Do not promote All Seasons into a four-season rating, and do not promote the temperature cell that says Comfort into the 32.2°F comfort number. Comfort, as a one-word cell, is not a temperature.

The 64-by-76 dimension cell is not the same shape as a 76-inch shoulder girth. A girth is a loop. A product dimension of 64 by 76 is a rectangle Amazon often fills with whatever number was nearest. The description's girths are the cut. The extra-wide title is the reason the shoulder is 76 inches rather than a regular bag's low 60s. A long Marmot style, 39620, is a different ASIN. Do not order 36310 because you are tall. Order it because you want the wide cut this card's title names.

How do you read the rating without borrowing a pad?

Kelty's own description says the EN numbers assume a 1-inch pad. The Ether Light and the Klymit are thicker and warmer than a 1-inch pad, and the XLite and the Tensor are a different insulation problem. A warmer pad does not rewrite the bag's cell. It changes the night. If you sleep colder than the standard weights in the Kelty description, the 32°F comfort line is the honest side of that card, and the 20°F feature is the number the bullet wishes were the whole story.

The Marmot description's tested comfort, 32.2°F, and tested limit, 21.6°F, sit in the same neighborhood as the Kelty description's 32°F and 21°F. That is a reason to compare the two descriptions, not a reason to call the bags the same. One is 550-fill down in the Kelty description. One is synthetic HL-ElixR Eco in the Marmot description. Down and a synthetic sheet do not dry the same way, and neither card prints a dry-time test. The Marmot description does say the insulation retains loft when wet. That is a claim in the description of a different, newer Trestles listing as well. On this extra-wide card, use the sentence that is actually on B083JSFF3F.

What actually fails on these two cards?

The Kelty card fails when 2 pounds 8 ounces and 2 pounds 11 ounces are averaged into a regular weight. It fails when the feature's 20°F comfort replaces the description's 32°F comfort without a sentence that says which line you used. It fails when the current website's recycled nylon and 2 pounds 7 ounces are called the fabric and weight of ASIN B004K1D9NK. It fails when 35413721LR, the long Cosmic, is ordered because the number started with 354137. It fails when a stuff size of 8 by 14 and a stuffed size of 8 by 15 are treated as one measurement.

The Marmot card fails when All Seasons is read as a winter bag. It fails when the temperature cell that says Comfort is read as 32.2°F. It fails when 3 pounds 1.4 ounces is replaced by a different Trestles length. It fails when the 64-by-76 dimension cell is called the sleeper's height and width. It fails when a regular-width bag is expected from an extra-wide title. It fails when the short feature Nylon is used to deny the description's synthetic insulation and 40D lining. Nylon can be the shell and still leave the insulation as a synthetic sheet.

What is this comparison not?

This is not a quilt comparison and it is not a pad comparison. This is not every Cosmic and every Trestles. 35413711RR is the regular down card. 36310 is the extra-wide synthetic card. A women's Trestles and a long Trestles are other ASINs. This is not a price quote. The price moves. Use the buttons if you want the live listing. This is not a promise that EN comfort will match how you sleep. Both descriptions define a standard body, and you are not required to be that body.

So which sleeping bag should you buy?

Buy the Kelty if you want part 35413711RR, ASIN B004K1D9NK, the regular down Cosmic, and if you will keep the 32°F description comfort and the 20°F feature comfort in separate sentences until you see the bag. Buy the Marmot if you want style 36310, ASIN B083JSFF3F, the extra-wide synthetic cut, the 76-inch shoulder, and the 3-pound-1.4-ounce description, and if you will ignore All Seasons. Buy neither if you wanted the long Cosmic, the pad, or the current nylon Cosmic without looking at the shell.

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