Monthly Best Backpacking Sleeping Bag Rankings

The Analytica Index is our ranking of the backpacking sleeping bag market. It combines value and performance by synthesizing user reviews, product specs, and price analysis into a single, easy-to-compare score, which helps you quickly pinpoint the top-rated backpacking tent that best suits both your budget and on-trail needs.

Backpacking Sleeping Bag Rankings Winter 2025

Product NameAnalytica IndexRetail PriceBelow Market*Field Score*Temp. Rating (°F)Weight (lbs)InsulationGenderHip Girth (in)Compressed Volume (L)ShapeSustainability
THE NORTH FACE INFERNO -20F1$685.00 $232.28 4.62-203.22DownUnisex618.9Mummy2
MARMOT SAWTOOTH 15 – MEN’S2$304.00 $121.40 4.66152.95DownMen’s59.58.9Mummy0
MOUNTAIN HARDWEAR BISHOP PASS 0 – MEN’S3$365.00 $216.24 4.603.22DownMen’s54.511.4Mummy1
MOUNTAIN HARDWEAR BISHOP PASS 15 – WOMEN’S4$315.00 $198.83 4.59152.67DownWomen’s548.7Mummy1
MARMOT TRESTLES ELITE ECO 20 – WOMEN’S5$179.00 $181.73 4.59202.68SyntheticWomen’s59.18.9Mummy1
MOUNTAIN HARDWEAR BISHOP PASS 30 – MEN’S6$275.00 $122.92 4.6301.83DownUnisex54.57.9Mummy1
SEA TO SUMMIT TREK 0F7$444.00 $55.40 4.7604.18DownUnisex58.714.2Semirectangular2
SEA TO SUMMIT SPARK 15F DOWN – WOMEN’S8$564.00 $23.87 4.85152.16DownWomen’s589Mummy1
MARMOT MAD RIVER 09$339.00 $98.80 4.6204.13DownUnisex57.911.9Mummy1
SEA TO SUMMIT TANAMI 45F DOWN COMFORTER10$257.50 $27.77 4.79451.68DownUnisex57.84Semirectangular1
NEMO DISCO 30 ENDLESS PROMISE DOWN – MEN’S11$279.95 $27.70 4.78302.03DownMen’s58.58.9Rectangular3
THERM-A-REST BOOST 650 32F/0C12$292.45 $37.82 4.76322.27DownUnisex676.3Semirectangular2
MARMOT ALWAYS SUMMER 40 – MEN’S13$209.00 $49.78 4.71401.85DownMen’s59.58.9Mummy0
MARMOT MAD RIVER 1514$309.00 $81.06 4.62153.06DownUnisex59.89.1Mummy1
MOUNTAIN HARDWEAR BISHOP PASS -15 WINDSTOPPER15$602.50 $117.22 4.45-154.02DownUnisex56.516.3Mummy2
SEA TO SUMMIT HAMELIN SYNTHETIC 30F16$181.00 $87.13 4.51302.63SyntheticUnisex64.28.9Semirectangular1
SEA TO SUMMIT SPARK 30F DOWN – WOMEN’S17$464.00 ($22.71)4.85301.29DownWomen’s554.7Mummy1
MOUNTAIN HARDWEAR BISHOP PASS 1518$315.00 $206.76 4.32152.53DownUnisex578.4Mummy1
NEMO DISCO 15 ENDLESS PROMISE DOWN – WOMEN’S19$314.95 $36.35 4.69153.47DownWomen’s57.593
SEA TO SUMMIT SPARK 30F DOWN20$464.00 ($2.31)4.78301.13DownUnisex55.14.8Mummy1
MARMOT NEVER SUMMER – MEN’S21$339.00 $99.98 4.4504.07DownMen’s59.88.9Mummy1
BIG AGNES ANTHRACITE 20 – MEN’S22$139.95 $53.90 4.59202.91SyntheticMen’s55.59.2Mummy1
SEA TO SUMMIT HAMELIN SYNTHETIC 15F23$201.00 $77.98 4.51153.82SyntheticUnisex64.28.9Semirectangular1
SEA TO SUMMIT TRAVELLER 45F DOWN24$207.00 ($36.88)4.83451.28DownUnisex57.53.7Mummy2
MARMOT ANGEL FIRE 25 – WOMEN’S25$269.00 $92.23 4.43252.87DownWomen’s58.58.9Mummy0
SEA TO SUMMIT SPARK 0F DOWN26$664.00 $47.62 4.5902.56DownUnisex55.110.3Mummy1
MOUNTAIN HARDWEAR BISHOP PASS 30 – WOMEN’S REGULAR27$245.00 $138.15 4.27301.92DownWomen’s507.9Mummy1
BIG AGNES LOST RANGER 3N1 1528$409.95 $127.12 4.24152.91DownUnisex62.511Semirectangular3
KELTY COSMIC 20 – MEN’S29$184.95 $222.67 4202.44DownMen’s588.9Mummy1
NEMO DISCO 15 ENDLESS PROMISE DOWN – MEN’S30$314.95 $58.73 4.5152.81DownMen’s57.57Rectangular3
SEA TO SUMMIT SPARK 45F DOWN – WOMEN’S31$349.00 ($56.86)4.85450.9DownWomen’s573Mummy1
SEA TO SUMMIT ASCENT 15F32$484.00 ($9.41)4.68152.4DownUnisex59.57.8Mummy2
SEA TO SUMMIT TREK 15F33$429.00 ($16.26)4.76153.36DownUnisex60.711.4Semirectangular2
MOUNTAIN HARDWEAR BISHOP PASS 30 – WOMEN’S – LONG – RIGHT ZIP34$265.00 $240.86 3.95301.44DownWomen’s538.1Mummy1
SEA TO SUMMIT ASCENT 15F – WOMEN’S35$484.00 ($52.36)4.84152.93DownWomen’s57.110.4Mummy2
SEA TO SUMMIT EMBER 30F DOWN QUILT36$429.00 $45.75 4.57301.28DownUnisex635.7Mummy1
ALPS MOUNTAINEERING ZENITH 037$389.99 $261.41 3.9503.28DownUnisex638.9Mummy0
MARMOT TRESTLES ELITE ECO 3038$159.00 ($14.74)4.71302.58SyntheticUnisex577.6Mummy1
REI CO-OP MAGMA 1539$399.00 $52.61 4.5152.34DownUnisex56.47.8Mummy2
THERM-A-REST SAROS 20F/-6C40$219.95 $32.97 4.59203.56SyntheticUnisex6412.2Mummy0
BIG AGNES GREYSTONE 20 – WOMEN’S41$269.95 $81.98 4.28232.44DownWomen’s54.56.8Mummy2
NEMO SOUL 30/40 ENDLESS PROMISE SYNTHETIC MUMMY42$269.95 ($41.03)4.77301.96SyntheticUnisex55.36.1Mummy1
BIG AGNES GREYSTONE 20 – MEN’S43$269.95 $152.11 3.96162.34DownMen’s55.58.7Mummy2
SEA TO SUMMIT BOAB SYNTHETIC 15F44$165.00 ($46.51)4.77154.71SyntheticUnisex65.88.9Semirectangular1
MARMOT TRESTLES ELITE ECO 30 – MEN’S45$164.00 $82.96 4.24301.96SyntheticMen’s56.98.9Mummy1
SEA TO SUMMIT SPARK 45F DOWN46$364.00 ($55.36)4.79450.83DownUnisex632.7Mummy1
MOUNTAIN HARDWEAR BISHOP PASS 30 – WOMEN’S47$275.00 $228.91 0301.37DownWomen’s51.58Mummy1
THERM-A-REST BOOST 650 20F/-6C48$337.45 $64.28 4.3202.99DownUnisex679Semirectangular2
BIG AGNES ANTHRACITE 30 – MEN’S49$129.95 $24.67 4.53302.25SyntheticMen’s55.57.9Mummy1
MOUNTAIN HARDWEAR LAMINA ECO AF 15F/-9C50$265.00 $109.62 4152.42SyntheticUnisex528.2Mummy1
NEMO RIFF 15 ENDLESS PROMISE DOWN – MEN’S51$424.95 ($28.10)4.68152.53DownMen’s546.7Rectangular3
NEMO RIFF 15 ENDLESS PROMISE DOWN – WOMEN’S52$424.95 ($69.64)4.81153.38DownWomen’s53.59.93
SEA TO SUMMIT SPARK PRO 15F53$669.00 ($79.21)4.83151.82DownUnisex55.17.5Mummy1
ALPS MOUNTAINEERING ZENITH 3054$259.99 $154.40 0302.16DownUnisex638.9Mummy0
NEMO SONIC 055$599.95 ($71.29)4.7803.31DownUnisex589.5Mummy2
BIG AGNES ANTHRACITE 20 – WOMEN’S56$139.95 $84.19 3.98203.31SyntheticWomen’s54.511.2Mummy1
MARMOT TRESTLES ELITE ECO 30 – WOMEN’S57$169.00 $53.34 4.2829.72.5SyntheticWomen’s588.9Mummy1
NEMO RIFF 30 ENDLESS PROMISE DOWN – WOMEN’S58$374.95 ($88.91)4.81302.28DownWomen’s53.55.93
REI CO-OP RADIANT 2059$199.00 $47.60 4.34192.62SyntheticUnisex57.36.6Mummy2
MARMOT SAWTOOTH – MEN’S60$309.00 $93.88 3.95153.09DownMen’s61.510.4Mummy1
MAMMUT COMFORT DOWN 19F/-7C – WOMEN’S61$299.95 $116.94 0192.5DownWomen’s517.1Mummy2
MOUNTAIN HARDWEAR SHASTA 15 – WOMEN’S LONG62$190.00 $22.60 4.45153.91SyntheticWomen’s5515.1Mummy1
SEA TO SUMMIT ASCENT 30F63$444.00 ($111.56)4.85301.83DownUnisex59.56Mummy2
MARMOT TETON 15 – WOMEN’S64$314.00 $36.91 4.39153.77DownWomen’s58.58.9Mummy0
WESTERN MOUNTAINEERING VERSALITE 1065$735.00 ($39.52)4.62102.06DownUnisex53.59.4Mummy0
MARMOT LITHIUM 066$599.00 ($14.86)4.5803.31DownUnisex55.98.9Mummy0
NEMO TEMPO 20 SYNTHETIC – MEN’S67$169.95 ($49.13)4.67203.75SyntheticMen’s58.59.7Rectangular1
SEA TO SUMMIT TREK 30F68$379.00 ($88.23)4.76302.62DownUnisex60.78.5Semirectangular2
SEA TO SUMMIT EMBER 45F DOWN QUILT69$364.00 ($80.31)4.75451DownUnisex634.4Mummy1
BIG AGNES LOST RANGER 3N1 070$479.95 $82.00 003.94DownUnisex62.58.9Semirectangular3
MARMOT TRESTLES ELITE ECO 2071$174.00 ($64.89)4.67203.82SyntheticUnisex60.79.6Mummy1
NEMO TEMPO 20 SYNTHETIC – WOMEN’S72$169.95 $4.02 4.43203.84SyntheticWomen’s5710.21
SEA TO SUMMIT SPARK PRO 30F73$564.00 ($151.79)4.81301.42DownUnisex55.15.4Mummy1
SEA TO SUMMIT VENTURE VTII 23 – WOMEN’S74$249.00 $47.40 4.18233.06SyntheticWomen’s588.90
THE NORTH FACE INFERNO 0F75$625.00 $80.81 002.75DownUnisex618.9Mummy2
NEMO DISCO 30 ENDLESS PROMISE DOWN – WOMEN’S76$279.95 $3.68 4.4302.34DownWomen’s56.55.13
SEA TO SUMMIT SPARK 15F DOWN77$774.00 ($115.49)4.78152.25DownUnisex779.6Mummy1
MOUNTAIN HARDWEAR BISHOP PASS 0 WINDSTOPPER78$507.50 $67.77 003.35DownUnisex53.712.9Mummy2
MOUNTAIN HARDWEAR SPECTER 15F/-9C79$655.00 ($96.99)4.75152.36DownUnisex53.56.7Mummy2
MOUNTAIN HARDWEAR BISHOP PASS 15 WINDSTOPPER80$417.50 $58.81 0152.57DownUnisex5310.5Mummy2
REI CO-OP MAGMA 3081$349.00 ($13.61)4.43301.55DownUnisex55.34.3Mummy2
SEA TO SUMMIT HAMELIN SYNTHETIC 15F – WOMEN’S82$201.00 ($68.22)4.62154.75SyntheticWomen’s598.91
THE NORTH FACE INFERNO 15F83$585.00 $55.77 0151.91DownUnisex618.9Mummy2
MARMOT TRESTLES ELITE ECO 084$199.00 $55.62 005.08SyntheticUnisex55.919.9Mummy1
NEMO PULSE 20/30 ENDLESS PROMISE ULTRALIGHT BACKPACKING QUILT85$564.95 ($13.56)4.34201.22DownUnisex572.7Mummy2
NEMO RIFF 30 ENDLESS PROMISE DOWN – MEN’S86$374.95 ($117.26)4.75301.94DownMen’s544.2Rectangular3
SEA TO SUMMIT TREK 15F – WOMEN’S87$429.00 ($43.44)4.51153.76DownWomen’s5913.62
WESTERN MOUNTAINEERING CLOUDLITE 1588$755.00 ($86.79)4.62152.19DownUnisex688.9Mummy0
REI CO-OP TRAILMADE 2089$119.00 $11.13 4.22213.43SyntheticUnisex61.310.3Mummy2
BIG AGNES TORCHLIGHT EXP 2090$379.95 $48.53 0202.52DownUnisex6512.8Mummy3
MOUNTAIN HARDWEAR PHANTOM 15F/-9C91$620.00 ($97.69)4.66152.07DownUnisex525.8Mummy2
REI CO-OP MAGMA 30 DOWN TRAIL QUILT92$329.00 $42.18 3.91301.4DownUnisex56.83.7Mummy2
NEMO SOUL 15/25 ENDLESS PROMISE SYNTHETIC MUMMY93$299.95 $39.68 0152.88SyntheticUnisex55.311.2Mummy1
BIG AGNES FLY CREEK UL ZIP QUILT94$359.95 ($241.00)4.75501DownUnisex55.54.5Mummy3
MARMOT TETON – WOMEN’S95$314.00 $23.59 0153.77DownWomen’s58.58.9Mummy1
NEMO FORTE 20 ENDLESS PROMISE – MEN’S96$209.95 ($37.61)4.27203.56SyntheticMen’s579.4Rectangular0
NEMO FORTE 35 ENDLESS PROMISE – WOMEN’S97$179.95 ($36.55)4.26352.75SyntheticWomen’s547.10
BIG AGNES GREYSTONE 30 – MEN’S98$229.95 $14.42 0301.88DownMen’s55.57Mummy3
MOUNTAIN HARDWEAR PHANTOM 30F/-1C99$520.00 ($96.93)4.52301.4DownUnisex524.1Mummy2
BIG AGNES TORCHLIGHT EXP 0100$479.95 $14.28 003.64DownUnisex659.2Mummy3
MOUNTAIN HARDWEAR LAMINA ECO AF 30F/-1C101$245.00 ($14.29)3.96301.94SyntheticUnisex527Mummy1
NEMO FORTE 35 ENDLESS PROMISE – MEN’S102$179.95 $1.07 3.88352.16SyntheticMen’s575.5Rectangular0
SEA TO SUMMIT VENTURE 23 F SYNTHETIC – WOMEN’S103$254.00 ($33.59)4.08233.23SyntheticWomen’s58.510.2Mummy0
SEA TO SUMMIT TREK 30F – WOMEN’S104$379.00 ($101.33)4.51302.93DownWomen’s5910.32
THERM-A-REST PARSEC 32105$449.95 ($71.92)4.45321.59DownUnisex57.58.9Mummy2
BIG AGNES ROXY ANN 3N1 15 – WOMEN’S106$399.95 ($11.03)3.67153.5DownWomen’s52.513.62
MOUNTAIN HARDWEAR PHANTOM WINDSTOPPER -40F/-40C107$1,365.00 ($292.09)4.62-404.62DownUnisex6215.7Mummy1
BIG AGNES TORCHLIGHT EXP 30108$339.95 ($12.75)0302.04DownUnisex659.4Mummy3
NEMO FORTE 20 ENDLESS PROMISE – WOMEN’S109$209.95 ($46.56)4.2204.09SyntheticWomen’s5412.40
EXPED DEEPSLEEP 20F110$139.95 ($99.35)4.45204.08SyntheticUnisex57.812Mummy1
MAMMUT TYIN MTI 5-SEASON111$239.95 ($19.69)3.81-136.47SyntheticUnisex5325.8Mummy0
MAMMUT COMFORT FIBER 30F/-1C112$139.95 ($21.58)0302.63SyntheticUnisex5112Mummy2
MARMOT NANOWAVE 45 – MEN’S113$94.00 ($129.63)4.51491.91SyntheticMen’s595.3Mummy0
BIG AGNES TORCHLIGHT UL 20114$449.95 ($50.87)4.08202.44DownUnisex662.7Mummy2
WESTERN MOUNTAINEERING DREAMLITE 35115$552.50 ($47.32)3.95351.44DownUnisex688.9Mummy0
BIG AGNES ROXY ANN 3N1 30 – WOMEN’S116$349.95 ($65.26)4.08302.63DownWomen’s52.59.72
MARMOT LOST COAST 40117$189.00 ($38.36)0402.17DownUnisex63.64Mummy1
NEMO TEMPO 35F SYNTHETIC – WOMEN’S118$149.95 ($61.30)0352.94SyntheticWomen’s577.61
WESTERN MOUNTAINEERING ALPINLITE 20119$720.00 ($155.35)4.21202DownUnisex55.59Mummy0
WESTERN MOUNTAINEERING KODIAK 0120$862.50 ($93.34)002.84DownUnisex5714Mummy0
BIG AGNES FLY CREEK UL 25121$509.95 ($106.29)0251.69DownUnisex55.58Mummy3
REI CO-OP ON X BEAMS X REI CO-OP ZEPHYR 25122$199.95 ($109.44)0253.13SyntheticUnisex57.58.6Mummy2
RAB MYTHIC ULTRA 180123$650.00 ($119.43)0301.06DownUnisex53.58.9Mummy1
EXPED DEEPSLEEP 45F/5C124$99.95 ($123.51)0452.09SyntheticUnisex57.86Mummy1
MOUNTAIN HARDWEAR SPECTER 30F/-1C125$555.00 ($133.93)0301.68DownUnisex53.55.7Mummy2
WESTERN MOUNTAINEERING PUMA STS -25126$1,225.00 ($191.46)0-253.78DownUnisex56.520Mummy0
WESTERN MOUNTAINEERING BISON STS -40127$1,380.00 ($199.50)0-404.47DownUnisex5525.2Mummy0
MOUNTAIN EQUIPMENT SNOWLINE128$962.50 ($206.91)0-93.34DownUnisex558.9Mummy0
MOUNTAIN HARDWEAR PHANTOM WINDSTOPPER 0F/-18C129$1,105.00 ($567.14)003.73DownUnisex588.9Mummy1
*Below Market: The dollar difference between a bag’s estimated market value and its retail price. Positive numbers mean you’re getting more value than you pay for; negative numbers mean you’re overpaying.
*Field Score /5: A statistically weighted average of user-star ratings out of 5 that adjusts for how many reviews a product has. This prevents items with only a few extremely high (or low) ratings from appearing more reliable (or not) than they actually are.