Roomy camp down1 / 11
Images: Sea to Summit and its retailers. Used for product identification.
Sea to Summit
Sea to Summit Trek -1 °C
A roomy 1119 g down bag with ISO comfort 3 °C that unzips flat into a quilt; around £211 discounted.
- Weight
- 1,119 g
- Comfort
- +3 °Cbrand's own figure
- Packed
- 8.2 L compressed
Best price found
£210.67
at Alpinetrek · In stock · RRP £300.95
- Sea to Summit UKDirect from maker£325View Deal
Prices checked 31 October 2026. We may earn a commission on these links.
- 650+ FP down
- RDS down
- Recycled fabrics
- Full-length zip
- Opens flat as quilt
Specifications
- Weight
- 1,119 g (regular (fits to 183 cm); Long 1253 g)
- Packed size
- 8.2 L compressed
- Comfort
- Comfort +3 °C / limit -1 °C
- Fill
- 650+ FP duck down, 380 g fill
- Shell & construction
- Outer: recycled 20D polyester, non-PFAS DWR. Lining: recycled 20D polyester; box-wall baffles, vertical chest baffles
- Rating Standard
- ISO rating (standard number not stated by maker)
- Fill Note
- RDS-certified duck down with non-PFAS Ultra-Dry treatment. Long 437 g. Sea to Summit's global page says 80/20 down; the UK page says 85% down cluster.
- Season
- 3-season
- Zip
- Full-length YKK side zip with two sliders plus foot-box zip
Pros & cons
- Full-length side zip plus a foot zip let it open fully flat as a quilt
- Relaxed tapered-rectangular cut with a fitted draught collar, per Sea to Summit
- Non-PFAS Ultra-Dry treated, RDS-certified down for damp UK nights
- 1119 g is heavy for 3 °C comfort; Rab's Mythic 0 °C is 500 g at similar ratings
- No independent editorial review found, and £325 RRP is steep, so buy discounted
Sources for this product
More down bags
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Hydrophobic 750 FP RDS down with a -4 °C comfort rating for under £300, direct from Alpkit.
- Weight
- 770 g
- Comfort
- -4.2 °Climit -10.8 °C
- Packed
- 25 × 18 cm
- 750 FP down
- Hydrophobic down
- RDS down
- 160 cm zip
- Draught collar
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Mountain Equipment Helium 400
The 3-season benchmark: 0 °C comfort at 820 g, widely stocked and often discounted.
- Weight
- 820 g
- Comfort
- 0 °Climit -6 °C
- Packed
- 24 × 21 × 20 cm
- 700 FP down
- RDS down
- Recycled fabrics
- Box-wall baffles
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Lightest for warmthCumulus
Cumulus Panyam 450
Polish-made 850 FP goose-down bag that undercuts the big brands; ships from Poland.
- Weight
- 810 g
- Comfort
- 0 °Cbrand's own figure
- Packed
- 26 × 18 cm, 6 L
- 850 FP down
- Box-wall baffles
- Two-way zip
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