A bug out bag (BOB) is a pre-packed bag containing everything needed to evacuate and survive away from home for 72 hours — the standard planning window before reaching a secondary shelter, family meeting point, or resupply. This guide covers the specific item list by category, weight targets, pack selection, and evacuation route planning. Survival shelter construction when you reach your destination is in emergency shelter construction: debris hut, lean-to, and snow shelter.
The Weight Problem: 20–25% of Bodyweight
The military standard for sustainable load-bearing is 33% of bodyweight for short distances. For civilians walking potentially 20+ miles over 72 hours, 20–25% of bodyweight is more realistic. For a 160-lb person, that is 32–40 lbs. Pack contents exceeding this target reduce sustainable travel speed and increase injury risk (joint stress, blisters).
The most common bug out bag mistake is over-packing. A bag that is too heavy will be left behind, abandoned, or cause early exhaustion. Every item must earn its place by passing: Will I definitely need this in a 72-hour evacuation?
Category 1: Water (Weight: 6.6 lbs for 3L)
- Sawyer Squeeze water filter (3 oz, ~$35): Filters from any fresh water source; 100,000-gallon lifespan. The single most important water item. Works as the primary and backup water treatment.
- 1L water bottle (stainless steel) (6.4 oz, ~$20): For boiling water when fuel is available and filter is compromised. Doubles as a cooking vessel.
- 2L collapsible water bag (2.5 oz, ~$12): Fills from a source for filter input; carries additional treated water.
- Aquatabs chemical treatment (10 tablets, ~$5): Backup if filter fails, for virus-risk environments.
- Pre-loaded 1L water: Carry 1L in the bottle to start — assume no water source for the first 2 hours of travel.
Category 2: Food (Target: 3,600+ kcal for 72 hours)
At 1,200 kcal/day minimum for a 72-hour evacuation under moderate exertion (1,800–2,400 kcal/day for active travel), target 3,600–7,200 kcal total. High-calorie-density items minimize pack weight:
- Peanut butter squeeze packs (4 × 250 kcal = 1,000 kcal, ~12 oz): No cooking, long shelf life, complete macros.
- Cliff bars or similar dense bars (6 bars × 240 kcal = 1,440 kcal, ~18 oz): Eat while moving.
- Instant oatmeal packets (4 packets × 160 kcal = 640 kcal, ~6 oz): Hot meal option with minimal fuel.
- Mixed nuts (8 oz bag = ~1,280 kcal, 8 oz): Calorie-dense, no cooking.
- Total: ~4,360 kcal, ~44 oz (2.75 lbs)
No-cook food options for when fire or cooking is not possible are in no-cook emergency food: 72-hour meal plan at 2,000 kcal/day.
Category 3: Shelter (Target: under 3 lbs)
- Emergency bivy or SOL Escape Pro bivy (9 oz, ~$50): Reflective waterproof shelter that retains 70% of body heat. Replaces a sleeping bag in most 3-season conditions. Lighter and more compact than a sleeping bag.
- Lightweight tarp or poncho (6×8 ft silpoly) (12–18 oz, ~$40): Overhead weather protection, lean-to capability.
- Paracord (50 ft, 550 type) (5 oz, ~$8): Tarp rigging, snare construction, multiple shelter applications.
Category 4: Fire (Target: under 6 oz)
- Bic lighter × 2 (1.8 oz combined, ~$2): The fastest and most reliable fire starting method. Always carry two.
- Ferrocerium rod (large, >1/2 inch diameter) (2 oz, ~$15): Works when wet; sparks in rain and cold where lighters fail. Full fire starting technique is in how to start a fire in wet conditions.
- Vaseline cotton balls × 20 (1 oz, pennies): Petroleum jelly-coated cotton balls are waterproof tinder that burns for 4–8 minutes, enough to ignite wet kindling.
Category 5: Navigation
- Baseplate compass (2 oz, ~$25–35): Silva Ranger or Suunto A-10. Functions without batteries.
- Printed topo maps of evacuation routes (2 oz, cost of printing): Laminated or in a waterproof map case. Print the 1:24,000 USGS quads covering all routes from home to bug-out destination plus alternates. Map reading technique is in land navigation without GPS: map, compass, and terrain reading.
Category 6: First Aid
- SOFTT-W or CAT tourniquet (3 oz, ~$30): For severe bleeding control. Must be trained to use before the emergency.
- Israeli bandage (6-inch) (3 oz, ~$8): Pressure bandage for wound management.
- QuikClot Combat Gauze or Celox (4 oz, ~$25): Hemostatic agent for wounds where tourniquet is not applicable.
- SAM splint + elastic wrap (4 oz, ~$8 combined): Improvised fracture stabilization.
- Personal medications (30-day supply if possible): Critical for anyone with chronic conditions.
Category 7: Communication
- Battery-powered NOAA weather radio (8 oz, ~$30): Midland ER310 receives NOAA weather alerts and AM/FM; solar charging panel and hand crank backup. Critical for situational awareness.
- Baofeng UV-5R or GMRS radio (7 oz, ~$25–60): Two-way communication with family or neighborhood network.
- USB power bank (20,000 mAh) (12 oz, ~$35): Charges phone, radio, and lights from stored power. 20,000 mAh charges most phones 4–5 times.
Category 8: Tools
- Fixed-blade knife (5–8 oz): ESEE-4 or Mora Companion Heavy Duty. Task capabilities: 9 tasks covered here.
- Headlamp + spare batteries (4 oz, ~$25–40): Black Diamond Spot or similar. Hands-free lighting critical at night and in shelter work.
- Emergency cash: ATMs and card readers fail during outages. Small bills (20s and under), minimum $200.
- Copy of key documents (waterproofed): Driver’s license, insurance cards, prescription information, important contacts list.
Pack Selection
For a 30–40 lb loaded pack, target a 50–65 liter backpack with a hip belt. Hip belt transfers 60–70% of load from shoulders to hips — critical for multi-day travel. Options:
- Osprey Atmos AG 65 (~$270): The standard hiking recommendation for this load range. Anti-Gravity suspension. Proper load transfer.
- 5.11 RUSH72 56L (~$165): MOLLE-compatible tactical pack for those preferring modular attachment. Slightly less ergonomic than Osprey for extended travel.
Evacuation Route Planning
Plan three routes from home to your bug-out destination: primary (fastest), secondary (avoids major roads), and foot route (no vehicle required). Verify each route annually by driving it and noting potential choke points (narrow bridges, single-road sections). Identify water sources along each route on your topo maps. Identify fuel, hospital, and resupply points on primary and secondary routes.
Where to Go Next
The vehicle bug-out kit — what stays in the car for extended vehicle-based evacuation — is in vehicle bug-out kit: gear for extended vehicle evacuation. Emergency shelter construction at the destination is in emergency shelter construction: debris hut, lean-to, and snow shelter.
