The Spark Women's sleeping bag is the perfect option for lightweight adventures. Specifically designed for women, the added warmth and heat retention offers versatility and functionality. Featuring an optimal warmth to weight ratio, the Spark Women's bag is equally compact and comfortable. Goose Down with Ultra Dry Down treatment for improved water resistance in damp conditions. Featuring 10-Denier Nylon shell and lining fabric, these lightweight fabrics offer breathability, protection and effective temperature regulation for premium comfort in the outdoors. 10D Nylon's waterproof and breathable features offer added protection and prevents exposure to tent wall condensation. The Mummy Fit maximises thermal efficiency and offers greater heat retention with a lightweight design for warmth, compactness, and comfort in the outdoors. 850+ FILL Power, RDS- certified, Goose Down with Ultra Dry Down treatment for improved water resistance in damp conditions. 10-Denier Nylon shell and lining. 10-Denier Nylon waterproof-breathable hood and foot box. Women's Mummy Fit: Fitted cut with a generous foot box and technical hood, to maximise thermal efficiency and minimise bulk and weight. Wider at the hips and narrower at the shoulders for a better fit and heat retention for women. Spark Women's -1C/30F Primary zip: 1/2 length #5 with zip-plow and two sliders. Vertical chest baffles, horizontal baffles lower half and base, box wall baffles top half of bag and sewn through quilted construction lower half. Standard front draft collar. Technical fitted hood with soft touch adjustment. Extra deep for a cosy like feel. Single, down-filled, draft tube along the top of all zippers. Pairing with unisex Sea to Summit bags, the QuiltLock system and drawcord foot box enables quilts to be secured to sleeping bags for added functionality and freedom. Pairs with STS quilts. Supplied with Ultra-Sil compression bag and storage cell. Bag weight 584g Fill weight 375g Suitable for body height to 170 Cm Season rating 2.5 TEMPERATURE RATING (EN LOWER LIMIT) Comfort -1 °C with Lower Limit of -7 °C Spark Ultralight Women's Sleeping Bag -1°C Regular