Sea to Summit Spark Pro Ultralight Sleeping Bag

The Sea to Summit Spark Pro Ultralight Sleeping Bag has been engineered for adventurers demanding the ultimate in warmth-to-weight performance. Designed with premium materials and intelligent features, this sleeping bag delivers exceptional comfort while remaining incredibly compact and lightweight, ideal for ultralight backpacking, fastpacking, and minimalist adventures. Whether you’re heading out on a summer alpine mission or pushing into shoulder-season chill, the Spark Pro’s versatile construction and thermal efficiency ensure reliable comfort across a range of conditions. Its high-performance design combines the finest insulation with thoughtful features to maximize warmth, minimize bulk, and give you a restful night under the stars.

Features:
Premium Insulation: RDS-certified 950+ fill power goose down with Ultra-Dry Down™ treatment for enhanced performance in damp conditions.
Lightweight Shell: Durable 10-denier nylon shell and lining fabric for breathability and comfort without compromising weight.
Water-Resistant Zones: Waterproof-breathable 10D nylon hood and footbox provide added protection against tent wall condensation.
Mummy Fit: Ergonomic shape with a generous footbox and technical hood for superior thermal efficiency.
Free Flow Zip System:
Full-length primary #5 zip with two sliders and zip-plow.
¼-length secondary #3 zip and footbox #3 zip, each with dual sliders for versatile ventilation.
Advanced Baffle Design:
Spark Pro -1: Vertical chest baffles, horizontal lower baffles, box-wall upper construction, quilted lower half.
Spark Pro -9: Box-wall baffle construction throughout for enhanced warmth.
Draft Collar & Hood: Scalloped front draft collar and deep, adjustable hood for added comfort and heat retention.
Compatibility: Integrates with Sea to Summit quilts via the QuiltLock™ system. Pairs with Women’s Sea to Summit sleeping bags.

Best For:
Ultralight backpacking
Lightweight adventures
Performance-driven minimalism

Included:
Ultra-Sil™ compression sack
Mesh storage cell

Materials:
Shell & Lining: 10D Nylon
Hood & Footbox: Waterproof-breathable 10D Nylon
Insulation: Ultra-Dry Goose Down 950+ Loft

Specifications -1ºC Model:
Temperature Rating: -1ºC (EN Lower Limit)
Weight: 619g
Fill Weight: 310g
Fit: Up to 185 cm
Season Rating: 2-season

Specifications -9ºC Model:
Temperature Rating: -9ºC (EN Lower Limit)
Weight: 782g
Fill Weight: 480g
Fit: Up to 185 cm
Season Rating: 3.5-season