Therm-a-Rest Regulus Blanket 40


Regular Long
Temp Rating 40°F / 4°C
Fill EraLoft
Weight 994 g / 2 lb 2 oz 1275 g / 2 lb 13 oz
Fits Up To 178 cm / 5 ft 10 in 193 cm / 6 ft 4 in
Girth 127/127/53 cm/ 50/50/21 in 147/147/61 cm/ 58/58/24 in

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Manufacturer's Description

The Regulus technical blanket is a popular choice for backpackers and thru-hikers. The streamlined blanket reduces weight by focusing on simple versatility and minimalist performance.

  • Carry Less—The streamlined blanket reduces weight by focusing on simple versatility and minimalist performance. Lightweight materials and efficient insulation make it a lighter, more packable alternative to a conventional sleeping bag.
  • More comfort, versatility and freedom of movement—blanket design allows users the freedom to roll, stretch and move across the entire span of a mattress without feeling confined. 
  • Sleep Securely—Partners with a mattress to create a complete sleep system. The shaped footbox wraps snugly around the foot of a mattress and insulated baffles prevent drafts. The included snap kit keeps the blanket secured to a mattress throughout the night.
  • The blanket also comes with a compartmental storage sack, lightweight stuff sack, and stash pocket.
  • Stuff sack: 20x46 cm / 8x8 in (Regular); 23x46 cm / 9x18 in (Long)
  • Shell: 30D Polyester with DWR
  • Lining: 50D Polyester


Retailers' Descriptions

Here's what other sites are saying:

The Regulus blanket from Therm A Rest offers unrestricted freedom of movement for summer-season camping and backpacking in warm weather conditions.


Complement your summer camping kit with the Therm-a-Rest Regulus Blanket. Ideally suited for warm weather and dry climates, this synthetic-fill bag strikes just the right balance between weight savings and warmth. With this lightweight sleeping bag and an ultralight air mattress in your pack, you'll be able to move fast on the trail and sleep soundly at night.


New for 2013! The Regulus Blanket partners with your mattress to create a sleep system offering excellent freedom of movement and temperature regulation in temperatures as low as 40F (4C). Synthetic eraLoft insulation offers warmth and loft that performs in all-weather conditions. A shaped footbox and insulated baffles create a secure connection with your mattress and prevent drafts. The included loop kit allows your blanket and mattress to function as one throughout the night. Comfortable: Blanket Construction offers free movement and temperature regulation. Warm: Insulated Baffles and an elasticized foot box create a seal around your mattress that keeps drafts at bay. Versatile: Included Loop Kit allows a wide range of attachment options. Synthetic: Light, compressible eraLoft(TM) synthetic insulation stays warm and dry in wet conditions. Regular Long Weight 2 lbs 2 oz / 944 g 2 lbs 14 oz / 1275 g Fits 5 ft 10 in / 178 cm 6 ft 4 in / 193 cm Girth, Shoulder 50 in / 127 cm 58 in / 147 cm Girth, Hip 50 in / 127 cm 58 in / 147 cm Girth, Foot box 21 in / 53 cm 24 in / 61 cm Width 50 in / 127 cm 58 in / 147 cm Length 78 in / 198 cm 80 in / 203 cm Packed dimension 8 x 18 in / 15 Liters in 9 x 19 in / 17 Liters in Fill eraLoft eraLoft Fill weight 25 oz / 720 g 36 oz / 1024 g Shell fabric 30D Polyester with DWR 30D Polyester with DWR Liner fabric 50D Polyester 50D Polyester Regulus is the brightest star in the constellation Leo, and is visible almost year-round.

- Mountains Plus

If a mummy bag is just too warm while you're camping on the shores of your favorite mountain lake in July, the Thermarest Regulus 40 Degree Blanket will provide the perfect amount of insulation. Insert your sleeping pad into the pouch created by the elasticized foot box and attach it using the included Loop Kit and you'll be warm and free of drafts all night long. The synthetic eraLoft insulation is hydrophobic and the shell is treated with a DWR (durable water resistant) finish so if you're surprised by a summer shower, you'll stay warm and dry. Grab this sleeping bag and your favorite sleeping pad and head up into the mountainsyou'll rest well and be recharged for the next day's adventure.

- Altrec Outdoors