.fd-spark { --fd-orange:#c86b2a; --fd-dark:#1f2933; --fd-muted:#5f6b76; --fd-border:#d8dde3; --fd-light:#f7f8fa; --fd-white:#ffffff; max-width:1200px; margin:0 auto; padding:40px 20px; font-family:Arial,Helvetica,sans-serif; color:var(--fd-dark); line-height:1.6; } .fd-spark * { box-sizing:border-box; } .fd-spark-grid { display:grid; grid-template-columns:1fr 1fr; gap:30px; align-items:start; } .fd-spark-images img { width:100%; display:block; border:1px solid var(--fd-border); border-radius:14px; margin-bottom:14px; background:#fff; } .fd-spark-badge { display:inline-block; padding:7px 12px; border-radius:999px; background:rgba(200,107,42,.10); color:var(--fd-orange); font-size:12px; font-weight:700; letter-spacing:.04em; text-transform:uppercase; margin-bottom:10px; } .fd-spark h1 { font-size:34px; line-height:1.15; margin:0 0 12px; } .fd-spark-sub { color:var(--fd-muted); font-size:16px; margin-bottom:18px; } .fd-spark-highlights { display:grid; grid-template-columns:repeat(4,1fr); gap:10px; margin:20px 0; } .fd-spark-highlights div { background:var(--fd-light); border:1px solid var(--fd-border); border-radius:10px; padding:12px; font-size:14px; } .fd-spark-btns { display:flex; flex-wrap:wrap; gap:10px; margin-top:18px; } .fd-spark-btn { display:inline-block; padding:12px 16px; border-radius:7px; text-decoration:none; font-size:14px; font-weight:700; } .fd-spark-btn-main { background:var(--fd-orange); color:#fff; } .fd-spark-btn-alt { background:#fff; color:var(--fd-dark); border:1px solid var(--fd-border); } .fd-spark-section { margin-top:40px; } .fd-spark-section h2 { font-size:26px; margin:0 0 12px; } .fd-spark-cards { display:grid; grid-template-columns:1fr 1fr; gap:20px; } .fd-spark-card { background:#fff; border:1px solid var(--fd-border); border-radius:14px; padding:22px; } .fd-spark-card h3 { margin:0 0 10px; font-size:20px; } .fd-spark-card ul { margin:0; padding-left:18px; } .fd-spark-card li { margin-bottom:8px; } .fd-spark-table { width:100%; border-collapse:collapse; border:1px solid var(--fd-border); overflow:hidden; border-radius:12px; } .fd-spark-table th { background:var(--fd-dark); color:#fff; text-align:left; padding:13px; font-size:14px; } .fd-spark-table td { padding:13px; border-top:1px solid var(--fd-border); font-size:14px; vertical-align:top; } .fd-spark-table tr:nth-child(even) td { background:var(--fd-light); } .fd-spark-banner { margin-top:40px; background:linear-gradient(135deg,#1f2933,#2d3943); color:#fff; border-radius:16px; padding:28px; } .fd-spark-banner h2 { color:#fff; margin:0 0 10px; } .fd-spark-banner p { margin:0; opacity:.95; } @media (max-width:900px){ .fd-spark-grid, .fd-spark-cards { grid-template-columns:1fr; } .fd-spark-highlights { grid-template-columns:1fr 1fr; } } @media (max-width:600px){ .fd-spark { padding:28px 14px; } .fd-spark h1 { font-size:28px; } .fd-spark-highlights { grid-template-columns:1fr; } } Ultralight / Backpacking Sea to Summit Spark Down Sleeping Bag – 30°F / Regular Fits Up To Height 6' 1'' An ultralight down sleeping bag built for users who want minimal weight and compact packability without giving up dependable warmth and comfort on the trail. Best UseUltralight Backpacking Performance2 Season Weight1 lb 1.4 oz / 493 g Compressed Volume4.5 L The 30°F / Regular variant is listed by Sea to Summit with a lower temperature rating of 30°F / -1°C, a half-zipper configuration, and a Regular size. It uses RDS-certified 850+ fill power goose down with a non-PFAS Ultra-Dry Down treatment, plus a breathable 10D liner and a 10D shell with non-PFAS DWR and a highly water-repellent hood and footbox fabric. Request a Quote View Collection Product Overview Sea to Summit describes the Spark as the bag for users who are counting grams but still want a great night’s sleep. For this 30°F model, the bag uses hybrid box baffles in the torso and sewn-through construction in the leg area to balance warmth and weight. :contentReference The product page also notes an ergonomic mummy shape, technical hood, anatomical footbox, YKK #5 zippers with zipper plough, and a zipper draft tube to help retain warmth. RDS-certified 850+ fill power goose down Non-PFAS Ultra-Dry Down treatment Breathable 10D liner fabric 10D shell with non-PFAS DWR Highly water-repellent hood and footbox fabric Technical hood and anatomical footbox YKK #5 zipper with zipper plough for snag-free operation Half-zip design for ultralight packability Ideal Applications Ultralight backpacking Fast-moving overnight trips Compact sleep systems 3-season minimalist loadouts in milder cold Users prioritizing warmth-to-weight efficiency Technical Specifications Specification Details Product Spark Down Sleeping Bag Variant -1 / 30°F / Regular Fits Up To Height 6' 1'' Best Use Ultralight Backpacking Performance 2 Season Weight 1 lb 1.4 oz / 493 g Compressed Volume 4.5 L Lower Temp Rating 30°F / -1°C Zipper Coupling Half-zipper, cannot be zipped to another sleeping bag Insulation RDS-certified 850+ fill power goose down with non-PFAS Ultra-Dry Down treatment Shell / Liner 10D shell with non-PFAS DWR, 10D breathable liner Baffle Construction Hybrid box baffles in torso, sewn-through in leg area Warranty Sea to Summit lifetime guarantee Why Choose This Model This version is a strong option for users who want very low carried weight, compact packed volume, and down insulation performance for ultralight missions and fast-moving overnight travel. Its 30°F / -1°C rating and 493 g weight make it one of the lighter serious sleep-system options in the category. Minimal Weight. Serious Sleep Performance. The Spark 30°F / Regular is built for users who need a compact, efficient, and technically advanced down sleeping bag for lightweight travel and high-mobility outdoor systems.
