Sea to Summit Traveller Sleeping Bag & Blanket 50

The Sea to Summit Traveller Sleeping Bag & Blanket 50 is the lightest bag in the Traveller line, built purely for summer use and travel. A comfort rating of 14°C and a limit of 10°C (EN/ISO 23537 tested) place it squarely in the one-season summer category — at 420 g, it's among the lightest bags in the catalog. The low weight comes from just 200 g of 750 fill power duck down at a 90/10 ratio with a hydrophobic treatment, wrapped in a very thin 15D nylon shell. The tapered cut and full-length zipper let it unzip completely to be used as a travel blanket, and two bags can be coupled into a double. Sized for users up to 183 cm, it packs into its included stuff sack and the down carries RDS certification. Given its minimal weight and narrow temperature range, it works well as a backup summer-camp bag, for air travel, or as an extra layer in warm weather — but it's not enough on its own for cooler nights.