XL 4-Piece Modular Sleep System


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Check out our available Long & Extra Long options

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  • Rare Long Length System
  • Patrol Bag
  • Intermediate Cold Weather Bag
  • Bivy Cover
  • 6 or 9 Strap Compression Strap



  • Patrol Bag: Rated for temperatures 50 to 30°.   Reversible double-pull (opens end to end) slider allows top or bottom ventilation.  Non-locking slide fastener self repairs if jammed or snagged.  Draft flap prevents heat loss.  Hood adjusts for heat retention; includes nylon drawcord and barrel lock.     Measures 87-89″ Long and 35-37″ Wide  (22-24″ at foot)    Approximately 3lbs   Color: Green  NSN:8465-01-452-1688
  • Intermediate Cold Weather Bag: Rated for temperatures 30 to -10°.   Sewn insulation does not migrate in the bag.  Anatomically designed foot box contains twice the insulation as the bag.   Sewn-in, quilted chest collar prevents air drafts up and down through the hood.   Hood adjusts for heat retention; includes nylon drawcord and barrel lock.       Measures 87-89″ Long and 34-36″ Wide (21-23″ at foot)      Approximately 4lbs    Color: Black  NSN:8465-01-452-1690
  • Bivy Cover features: Made of durably waterproof and windproof 3-layer GORE-TEX® fabric. When combined with Patrol and ICW bags, the system is rated to climates -20 and  to -50° with proper clothing.  Approved by all departments and agencies of the Department of Defense. Includes snap fastener and slide fastener. Measures 87-89″ Long and 34-36″ Wide (27-29″ at foot)   Color: Woodland Camouflage  NSN:8465-01-452-1695
  • Stuff Sack: Compressible to one cubic foot, six or nine 1″-wide nylon webbing straps adjust by ladder lock buckles. Reinforcement webbing is sewn around the circumference of the bag.  Nylon drawcord closure with a barrel lock Measures up to 23.5″ in length, Just over 10″ in diameter.   Color: Black

This XL system is 6″ longer than the standard MSS and hard to find complete.  The patrol bag, intermediate cold weather bag and the bivy cover snap together to create a sleep system unrivaled in warmth, weather resistance and portability when carried in the compression stuff sack.   With proper ECWCS clothing layers, this system can keep you comfortable in temperatures from 50 to -50! The entire system is under 12 pounds and can be compressed into one cubic foot inside of the stuff sack. The bivy (outer) cover is wind and water resistant and is often used in place of a tent when situations require it.  This system is perfect for survival situations, extreme campers and hikers as well as recreational scouting and family camping trips.  Available is a variety of  conditions, there is a sleep system for every budget!

New (New Old Stock) Never issued, not in plastic bag. May show signs of extended bulk storage to include LIGHTLY scuffed zipper pulls/snaps or snagging around Velcro closure. Stuff Sack buckles may be scratched/scuffed from extended bulk storage. Crisp and clean genuine military surplus. May contain manufacturer markings/defects.

Very Good
These bags show little to no use. May show signs of extended bulk storage to include scuffed zipper pulls/snaps or snagging around velcro closure. May have small snags, stains, pin holes or minute tears that can be easily repaired with a needle and thread. Stuff Sack buckles may be scratched/scuffed from extended bulk storage. May contain unit or soldier identification. Genuine military surplus that would be considered new if not for the minor defects.





Shows light to moderate use, some staining, fading, fabric wear or small holes that are repairable.  May contain unit or soldier identification. Product is in good working order and will function as intended.






Additional information

Weight 11 lbs
Dimensions 17 × 13 × 13 in
Excellent, Used

This rare set includes an almost new XL Bivy, XL Patrol Bag, Stuff Sack and a used, good condition XL ICW Bag. Expect very light markings, possibly a name, faded paint on zippers, etc. The ICW bag might have some light fabric piling, a possible repair, markings.

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