3F UL Gear Tyvek Bivvy Bag

Stay warm and dry with the 3F UL Gear Tyvek Bivvy Bag, a lightweight, breathable shelter designed for mummy sleeping bags and quilts. It shields against tent condensation and dirt while adding extra insulation for all-weather camping.

• Material: Tyvek is ultralight, waterproof, and breathable, letting vapour escape while keeping moisture out.
• Compatibility: Designed for mummy sleeping bags and quilts; acts as an outer shield to keep your bag clean in wet or muddy conditions.
• Weight: Type A (Quilt) 135g; Type B (Mummy) 200g—choose the option that best fits your pack weight and space.
• Dimensions: Type A 180 cm x 145 cm (70.8" x 57.09"); Type B 230 cm x 90 cm (90.55" x 35.43").
• Packed size: 16 cm x 8.5 cm (6.3" x 3.35") for compact carry.
• Closure: With Zip or Zipless option—zip provides easy entry/exit and a bit more protection, while zipless reduces weight.
• Color: White, a practical choice for alpine and snowy environments.
• Contents: 1 x Tyvek Bivy Bag plus 1 x Compression Sack.
• All-weather use: Suitable for all-weather camping, with the caveat that heavy downpours are best handled with a proper shelter or a heavier bivvy.
• Alternative option: For harsher rain, consider a heavier bivvy like the Bushmen HIDEOUT Thermo.

This bivvy bag protects your sleeping bag from moisture and dirt, while the breathable Tyvek helps reduce condensation buildup inside your shelter. It adds a touch of insulation on cold nights, helping you stay warmer without bulky layers. The two closure options let you tailor weight and convenience to your trip — opt for the zip version when ease of access matters most, or the zipless version when every gram counts for long treks. Free delivery over £60 makes this practical upgrade easy for weekend trips or longer expeditions.