Rab Neutrino Sleeping Bag

While it is rated as a summer bag, the 800FP goose down and boxwall construction provide a significant warmth-to-weight ratio that can handle chilly spring or autumn nights. However, if you are camping in freezing temperatures, you may find it lacks the insulation needed for true winter conditions.

The Neutrino features a narrow mummy silhouette designed to minimize dead air space for better thermal efficiency, which can feel snug. If you prefer a lot of room to sprawl, this might feel restrictive, but the angled foot box does help accommodate a more natural, relaxed sleeping posture.

The hydrophobic finish helps the down resist moisture absorption and dry out faster than untreated down, which is a major advantage in humid environments or if condensation builds up inside your tent. It is not waterproof, however, so you should still use a ground sheet or bivy to keep the shell dry.

The 3/4 length zipper is a deliberate choice to save weight and reduce heat loss compared to a full-length zip. While it requires a bit more maneuvering to get in and out, the anti-snag design makes it smooth to operate when you need to vent or exit quickly.

Yes, the bag comes with a waterproof roll-top compression sack. It is highly effective at keeping your sleeping bag dry inside your pack, even during rainy approaches or river crossings.