The Traveller 50 Sleeping Bag is rated at season 2 making it perfect for the summer months. Windproof and breathable, it’s soft and insulating keeping you cosy and comfy all night. Season 2 - This is suitable from late spring to early autumn, with an extreme temperature rating of 0C Comfort Temperature - 11C – 14C. The ‘comfort’ temperature is the minimum temperature that a sleeping bag is designed for Extreme Temperature - The extreme temperature is a survival only rating for a ‘standard’ adult woman.