The Ascent Sleeping Bag is the most versatile in Sea to Summit's sleep range and is suited to a multitude of climates, conditions, and adventures. From long distance hiking to weekend getaways, the ultra-lightweight 750+ FILL Power offers added warmth in cooler climates while the Free Flow Zip System allows for added airflow and ventilation in warmer climates. Putting comfort and adaptability at the forefront, the Ascent Sleeping Bag is a premium option for versatile adventures. Goose Down with Ultra Dry Down treatment for improved water resistance in damp conditions. The Free Flow Zip System offers temperature regulation and multiple sleeping bag configurations for added freedom in the outdoors. With a spacious design, adjustment cord and room to fit a regular Sea to Summit pillow, the Technical Regular Hood offers comfort and flexibility for car camping and shorter adventures. 750+ FILL Power, RDS- certified, Goose Down with Ultra Dry Down treatment for improved water resistance in damp conditions. Recycled 20-Denier Nylon shell and lining. 10-Denier Nylon waterproof-breathable hood and foot box. Relaxed Mummy Fit: A more relaxed yet tapered mummy fit with high thermal performance. Free Flow Zip System: Primary zip: full length #5 with zip-plow and two sliders. Secondary zip: 1/2 length #5 with zip-plow and two sliders. Foot box zip: #5 with two sliders. Vertical chest baffles, horizontal baffles lower half and base, box wall baffle construction throughout. Fitted front draft collar: scalloped over the neck and oversized at the shoulders. Generous fitted hood with two soft touch adjustments. Fits a Sea to Summit regular pillow. Single, down-filled, draft tube along the top of all zippers. Pairs with Women's Sea to Summit bags. Pairs with STS quilts. Sea to Summit Regular Pillow fits inside hood. Internal pocket for phone / GPS / valuables Includes lightweight Ultra-Sil compression bag and storage cell Bag weight 1020g Fill weight 540g Suitable for body height to 185 Cm Season rating 3.5 TEMPERATURE RATING (EN LOWER LIMIT) Comfort -2 °C Lower Limit -8 °C Ascent Down Sleeping Bag -9°C Regular