Sea to Summit Spark 30 Sleeping Bag vs Western Mountaineering AstraLite Quilt

Weight and specs compared for 2026 — and which one to choose.

Both weigh the same at 482 g, so choose on features, price and fit.

Spec	Sea to Summit Spark 30 Sleeping Bag	Western Mountaineering AstraLite Quilt
Weight	482 g · 0.482 kg · 1.06 lb	482 g · 0.482 kg · 1.06 lb
Brand	Sea to Summit	Western Mountaineering
Category	Sleep System	Sleep System

Sea to Summit Spark 30 Sleeping Bag

482 g

Ultralight 30°F mummy bag filled with 850+ loft down. Differential cut and ripstop shell deliver excellent warmth-to-weight ratio.

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Western Mountaineering AstraLite Quilt

482 g

35°F sleeping quilt with 850+ fill power down, thin crisscross elastic back strap for secure fit, and premium hand-sewn construction.

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Sea to Summit Spark 30 Sleeping Bag vs Western Mountaineering AstraLite Quilt: which should you buy?

On weight these two are identical (482 g), so your decision comes down to features, fit and price. Check the full details and current price for each above.

See where both rank against everything else in this category on the lightest sleep system page, or browse the full gear weight database.

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