Be Ready: the sleeping bags worth keeping for a power cut
Budget down

Images: Decathlon Simond and its retailers. Used for product identification.

Decathlon Simond

Decathlon Simond MT900 5 °C Down

A no-frills three-season down bag that undercuts the outdoor brands by £100.

Weight
830 g
Comfort
+5 °Climit 0 °C
Packed
27 × 17 cm

Best price found

£149.99

at Decathlon · Price from Decathlon's UK search listing

View Deal

Prices checked 31 October 2026. We may earn a commission on these links.

  • 700 FP down
  • RDS down

Specifications

Weight
830 g
Packed size
27 × 17 cm
Comfort
Comfort +5 °C / limit 0 °C
Fill
700 FP down, 370 g fill
Shell & construction
100% polyamide 20 g/m², 10 denier with 30 denier ripstop; 4 cm high compartments with mesh baffles in Z…
Rating Standard
ISO 23537 rating
Fill Note
370 g in size L; RDS-certified per Advnture review
Season
3-season
Zip
3/4-length YKK double-slider zip with anti-snag system…
Manufacturer page →

Pros & cons

  • Affordable for a down bag
  • Comfortable, lightweight and packable
  • RDS-certified down
  • Cut might be too restrictive for some

Sources for this product

  1. 1Decathlon UK listing
  2. 2Decathlon Cyprus product data
  3. 3Advnture review, 8 Dec 2024

More down bags

Full comparison →