BLACK ICE B400 Envelope Down Sleeping Bag — Lightweight warmth for 3-season camping and backpacking.

The B400 is the most versatile entry-level model in BLACK ICE's B-series, offering an excellent balance of warmth, weight, and price. It is filled with 400g of 650+ fill power grey duck down with a 90% down content ratio, delivering reliable insulation for spring, summer, and autumn adventures. The 20D ripstop nylon shell features a water-repellent treatment, while the graphene conductive lining provides anti-static and antibacterial properties.

Key Features:
✅ 400g 90% Grey Duck Down, 650+ Fill Power: High-quality down for excellent warmth-to-weight ratio.
✅ Comfort 7°C / Extreme 2°C: Suitable for 3-season use. High comfort limit 13°C.
✅ 20D Ripstop Nylon Shell with DWR: Windproof and water-repellent for durability in harsh conditions.
✅ Graphene Conductive Lining: Provides anti-static performance, infrared heat retention, and antibacterial protection.
✅ Thermal-Efficient Design: Features a draft collar, 3D footbox, and wind-blocking baffles for superior heat retention.
✅ Two-Way YKK Zipper: Durable and easy to adjust, with interconnectable design for two bags to zip together.
✅ Compact & Lightweight: Weighs only 720g (M) / 740g (L). Packs down to 34×16cm (M, normal compression) or 19×16cm (M, extreme compression).

Temperature Rating:

• Extreme Temperature: 2°C

• Comfort Temperature: 7°C

• High Comfort Temperature: 13°C

Specifications:

• Brand: BLACK ICE

• Model: B400

• Type: Mummy-Style Down Sleeping Bag

• Fill Material: 650+ Fill Power Grey Duck Down (Teflon-treated)

• Down Content: 90%

• Fill Weight: 400g

• Shell Fabric: 20D Ripstop Nylon (GRAMART®)

• Lining: Graphene Conductive Anti-Static & Antibacterial Fabric

• Zipper: YKK® Dual-Sided

• Size M: 75 × 195 cm (Weight: 720g)

• Size L: 80 × 205 cm (Weight: 740g)

• Packed Size (M): 34 × 16 cm (Normal) / 19 × 16 cm (Extreme)

• Suitable Height: M for ≤175cm / L for ≥175cm

• Color: Black

What's in the Box:

• B400 Sleeping Bag × 1

• Compression Sack × 1

• Storage Bag × 1

• Pillow (Gift) × 1

黑冰 B400 信封式羽绒睡袋——三季露营与徒步的轻量化保暖之选。

B400 是黑冰 B 系列中最具性价比的入门款，在保暖性、重量与价格之间取得了出色平衡。填充400克650+蓬松度灰鸭绒，含绒量90%，为春夏秋三季户外活动提供可靠保暖。20D防撕裂尼龙外壳经过防泼水处理，石墨烯导电里料具备抗静电与抑菌性能。

核心功能亮点：
✅ 400克90%灰鸭绒，650+蓬松度： 高品质羽绒，保暖重量比出色。
✅ 舒适温标7℃ / 极限温标2℃： 适合三季使用，舒适高温13℃。
✅ 20D防撕裂尼龙外壳（防泼水）： 防风防泼水，恶劣条件下更耐用。
✅ 石墨烯导电里料： 具备抗静电、远红外保暖及抑菌功能。
✅ 高效保暖设计： 立体防风条、3D脚部空间及挡风墙设计，有效锁温。
✅ YKK双开拉链： 耐用顺滑，可拼接设计，两条睡袋可组合成双人睡袋。
✅ 紧凑轻量： M码仅重720g / L码740g。M码正常压缩34×16cm，极限压缩19×16cm。

温标参考：

• 极限温度：2℃

• 舒适温度：7℃

• 舒适高温：13℃

产品参数：

• 品牌：BLACK ICE 黑冰

• 型号：B400

• 类型：木乃伊式羽绒睡袋

• 填充物：650+蓬松度灰鸭绒（Teflon防泼水处理）

• 含绒量：90%

• 充绒量：400克

• 外壳面料：20D防撕裂尼龙（GRAMART®）

• 里料：石墨烯导电抗静电抑菌面料

• 拉链：YKK® 双开

• M码尺寸：75 × 195 cm（重量：720g）

• L码尺寸：80 × 205 cm（重量：740g）

• M码收纳尺寸：34 × 16 cm（正常）/ 19 × 16 cm（极限）

• 适用身高：M码适合175cm以内 / L码适合175cm以上

• 颜色：黑色

包装清单：

• B400 睡袋 × 1

• 压缩袋 × 1

• 收纳袋 × 1

• 赠品枕头 × 1