Sea to Summit
Spark Pro 30
Manufacturer list price (MSRP)
$549.00
Retailer prices change, so we show the manufacturer list price and link out for you to check the current price.
RidgeNote is reader-supported: if you buy through the retailer links below, we may earn an affiliate commission at no extra cost to you. As an Amazon Associate I earn from qualifying purchases.

Overview
The Sea to Summit Spark Pro is the brand's flagship ultralight down bag, built with 900+ fill power goose down and a 10D nylon shell for maximum warmth at minimum weight and pack size. The 30-degree model is a two-season backpacking bag for weight-conscious trips.
Specs
- Brand
- Sea to Summit
- Weight
- 480 g · 16.9 oz
- Temp rating
- 30°F / -1°C (manufacturer rating, not independently ISO 23537 / EN 13537 tested)
- Fill
- 900+ fill power goose down, Ultra-Dry Down (RDS certified)
- Shape
- Mummy
- Fill Material Type
- ‎Down
- Item Package Dimensions L x W x H
- ‎13.4 x 7.7 x 5.3 inches
- Materials
- PFC free shell, nylon liner
- Outer Material
- ‎Nylon
Weight vs. category
48% heavier than the category average.
RidgeNote verdict
Similar — lighter or cheaper
Related reading
The Complete Beginner Backpacking Gear List
Everything you actually need for your first overnight, from our own catalogue — with the honest budget math and where to buy it.
Best Lightweight Backpacking Tents (2026)
The eight shelters in our catalogue, ranked by published weight, floor area, and list price — with an honest reason to skip every one of them.
Best Sleeping Pads for Backpacking 2026
Fourteen pads from R 1.3 to R 7.7, compared on the manufacturers’ published insulation and weight figures — air, self-inflating, and foam, with a reason to skip each.
Manufacturer list price (MSRP)
$549.00