USGI Modular Sleep System — 4-Piece Cold Weather Sleeping Kit. Sub-Zero Ready, USMC-Style.
The complete US military-style modular sleeping system — 4 pieces (intermediate cold-weather bag, patrol bag, waterproof BiVy cover, compression stuff sack) layered for temperatures from above freezing all the way down to sub-zero. Available in 5 military camo patterns.
• Complete 4-Piece Modular Kit
Intermediate cold-weather sleeping bag + lightweight patrol/summer bag + waterproof BiVy cover + compression stuff sack — layer them together for sub-zero conditions, or run any single piece for milder weather.
• Temperature-Layered Carry
Patrol bag alone for warmer nights (~+50°F / +10°C). Add the intermediate bag for shoulder-season cold. Add the BiVy cover for wet weather and to push the range down toward 0°F / -18°C and below.
• Waterproof Breathable BiVy Cover
Outer BiVy is built from waterproof/breathable fabric — sheds rain, snow, and ground moisture while letting body vapor out. Sleep on the ground without a tent if you have to.
• Compression Stuff Sack Included
Compressible carry sack packs the full system small enough to strap to a rucksack frame — built for field deployment, not bulky civilian camping.
• 5 Military Color Options
UCP (Universal Camouflage Pattern) / Camouflage / Woodland / OCP / Olive Drab — match your loadout, your terrain, or your service-era preference.
Perfect For:
Cold-weather deployments · Mountain & backcountry overnight · Hunting camps · Bug-out & survival kits · Long-duration field operations
Product Specifications:
- Type: 4-piece modular military-style sleep system
- Pieces: Intermediate bag + patrol/summer bag + BiVy cover + compression sack
- BiVy Shell: Waterproof / breathable fabric
- Temperature Range: ~+50°F (patrol only) down to sub-zero (full layering, environment-dependent)
- Available Colors: UCP / Camouflage / Woodland / OCP / Olive Drab
What's Included:
✔ Intermediate Cold-Weather Sleeping Bag
✔ Patrol / Lightweight Sleeping Bag
✔ Waterproof Breathable BiVy Cover
✔ Compression Stuff Sack