Sierra Designs Cloud 800F 20 Deg Regular Sleeping Bag

Product Overview

The Sierra Designs Cloud 800F 20° Regular is a premium, comfort-oriented 3-season sleeping bag built for backpacking and camp-out adventures where nighttime temps may dip into the teens °F. It offers a unique “bed-like” experience while still leveraging high performance insulation. With its inventive zipperless design and high-fill down insulation, this bag blends comfort and functionality.

Key Features & Benefits

• 800-fill DriDown® insulation: High loft goose/duck down treated to resist moisture, which helps maintain warmth even in damp conditions. Sierra Designs+2gearx.com+2

• Zipperless comforter-style design: Instead of a typical full-length side zipper, the bag uses an integrated comforter flap that wraps around you, increasing freedom of movement and reducing zipper-draft issues. T3+1

• Sleeping pad sleeve: A built-in sleeve to secure your sleeping pad beneath you, preventing slip and ensuring you remain insulated on the underside (since bottom insulation is minimized). Sierra Designs+1

• Self-sealing foot vent: Allows you to pop out your feet or vent the bag when it gets warm, giving temperature flexibility. Sierra Designs

• Insulated shoulder pocket/over-flap: Helps seal out drafts at critical heat-loss zones like shoulders and neck. T3

• Light, technical shell/liner fabrics: Uses 15-denier nylon ripstop for both shell and liner to keep weight down and packability good. Sierra Designs+1

Specifications (Regular Size)

• Temperature Ratings: EN Lower Limit ~ 15 °F (-10 °C), EN Comfort ~ 26 °F (-3 °C) Drop+1

• Designed for sleepers up to ~6′0″ (183 cm) in the Regular size. Drop+1

• Shoulder circumference ~60″ (152 cm), hip ~58″ (147 cm), footbox ~40″ (102 cm) for the Regular size. Sierra Designs+1

• Fill Weight (Regular): ~14.8 oz (419 g) of down. Sierra Designs

• Weight (Regular): ~1 lb 12 oz (~793 g) per one spec list. Drop

• Materials: Insulation: 800FP PFC-Free DriDown®. Shell/liner: 15d nylon ripstop. gearx.com+1

Best Use Cases

• Ideal for spring through fall backpacking trips when you might see low temps around the teens to 20s °F.

• Campers who value extra comfort and movement, not a rigid mummy bag fit; good for side-sleepers, for example.

• Backcountry users who want high performance in a light, packable form, but still want comfort rather than ultra‐minimalist.

• Situations where you can pair the bag with a good sleeping pad (especially one with decent insulation) — since the bottom insulation is minimized in favor of a pad sleeve.

Considerations & Trade-Offs

• Because the bottom is minimally insulated (pad sleeve design), your pad really matters. As one review notes, “In colder conditions… we did start to get cold — but the mat was the culprit, not the bag.” T3

• Though rated to roughly 15 °F lower‐limit, individual comfort will vary widely depending on how warm your pad is, clothing layers, wind, humidity, and how well the bag is sealed around you.

• The zipperless design is great for comfort and movement, but if you prefer a full zip or standard side-zip mummy bag, this is a departure from that style.

• Since the shell and liner are light denier fabrics (15d), you’ll want to treat the bag with care (avoid abrasion, rough surfaces) to preserve durability.

Summary

If you’re looking for a well-designed sleeping bag that delivers warmth, comfort, and freedom of movement for 3-season adventures and cooler nights, the Sierra Designs Cloud 800F 20° (Regular) is a strong choice. It blends innovative features (zipperless comforter flap, pad sleeve, foot vent) with quality materials (800-fill DriDown, nylon ripstop) to create a sleeping bag that doesn’t force you to sacrifice comfort for performance. Just be sure to pair it with a good sleeping pad and gear that suits the expected conditions.