Sea to Summit Hamelin Synthetic Sleeping Bag 15-Degree Long – Contour Shape & Revive Loft

Overview

The Sea to Summit Hamelin Synthetic Sleeping Bag brings performance and comfort to backcountry nights, from damp riverbanks to cool ridgelines. Its contour-cut design leaves you room to roll and shift without feeling restricted, while Revive Loft insulation targets warmth where you need it most. Built for versatility, this bag is ready for a range of climates and activities, offering a reliable mix of breathability, warmth, and dry-down protection in a compact, pack-friendly package.

Adaptive warmth and ventilation

The bag isn’t a rigid temperature box—it emphasizes warmth where your body needs it and breathable comfort where you don’t. The Free Flow full-length zipper with double sliders lets you tailor airflow from a snug, draft-free cocoon to a fully unzipped quilt for sunlit afternoons at camp or post-hike drying. This adaptability supports varied nights, from foggy mornings to starry, crisp evenings.

• Contour silhouette supports side sleeping and freedom of movement without added bulk
• Body-mapped Revive Loft insulation delivers warmth precisely where it matters
• Full-length, two-slider zipper enables targeted ventilation and easy conversion to a flat quilt
• Camp usability: shoulder snaps, footbox zipper, and wear-around-camp capability for warmth on the go

Materials, sustainability, and protection

Designed with environmental responsibility in mind, the Hamelin uses RCS-certified recycled fabrics and insulation, paired with a bluesign APPROVED non-PFAS durable water-repellent finish. The combination offers dependable moisture protection while aligning with sustainable manufacturing practices. The product line is part of Sea to Summit’s 1% for the Planet commitment, underscoring a broader impact beyond on-trail performance.

Durability meets versatility through four style options—15-Degree Regular, 15-Degree Long, 30-Degree Regular, and 30-Degree Long—so you can pick the warmth and length that fit your height and climate. The Long variants extend to 83 x 33 inches, with longer measurements and added warmth for taller users, while Regular versions stay compact for lighter packs.

Fit, sizes, and camp-ready details

In addition to the warm performance, practical features enhance field use: you can close shoulder snaps for draft-free comfort around camp, open the footbox zipper for quick ventilation after a hot afternoon, or wear the bag as a lightweight layer when the evening turns chilly. The Hamelin is designed to be a reliable companion across seasons, with a straightforward care approach and a lifetime guarantee against material or workmanship defects.

Whether you’re planning a multi-day trek, a paddling trip, or a weekend under canvas, the Hamelin Synthetic Sleeping Bag offers a balanced blend of warmth, breathability, and sustainability that can adapt to your backcountry routine. It’s a thoughtful option for campers who value performance without sacrificing responsibility.