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Therm-a-Rest makes the best sleeping bags on the market and the superb Parsec -18°C is no exception. It is warm, cosy, light, very packable, fully-
featured and eco-conscious - aka it ticks all of the boxes. With a best-in-test -10°C comfort rating but clocking in at just 1155g (excluding
compression bag), it offers a phenomenal warmth-to-weight balance. This is achieved through clever 'heat-mapped zoned insulation', with 70%
of the down in the top of the bag where you need it most, and only 30% below your body (where it'll be crushed and thus insulate less effectively). Hence. the Parsec is able to deliver better temperature ratings at a similar weight to competitor products - a massive win. Other features include a
100% recycled ripstop nylon DWR shell and liner, 'synergy link' connectors which strap your bag to your mat for an integrated sleeping system, a
super-cosy 'toe-asis' footbox, and heat-trapping draft collars and baffles. A compression and stuffsack are provided too.

IF WE'RE BEING FUSSY

We haven't had time to test the long-term durability of this bag's lightweight construction - will it cope well with prolonged heavy use in the outdoors? The premium price will be prohibitive for many, and the temperature ratings may be overkill for milder winter camps.