Grayl Mission EXP Hip Pack - 4.5L
The GraylMission EXP Hip Pack is a modular waist pack built for travel, hiking, overlanding, and everyday carry. Offering 4.5 liters of organized storage with the ability to expand to 6.5 liters, it provides a compact carry solution without sacrificing accessibility or versatility.
Designed around Grayl's BottleDrop™ and BottleLock® systems, the Mission EXP securely carries your GeoPress®, UltraPress®, or other water bottles while maintaining quick access on the move. Combined with customizable internal organization, MOLLE compatibility, and recycled performance materials, it is equally at home on the trail, in the city, or during international travel.
"A prudent person foresees danger ahead and takes precautions. The simpleton goes blindly on and suffers the consequences. - Proverbs 27:12"
Durable Recycled Fabric
500D & 1000D coated nylon outer shell, bluesign® approved.
Expanse BottleDrop™ Pockets
Dual stretch pockets fit GRAYL bottles, windbreakers, or bear spray.
BottleLock® Tie-Down System
Non-slip PVC coating secures GRAYL bottles or gear under motion.
Internal Organization
Triple-zip main compartment with mesh pockets, card slots, and concealed valuables pocket.
MOLLE + Velcro Expansion
Front panel and steel O-ring accept G-Mod Velcro Pouches and other accessories.
Comfortable Fit
Heavily padded mesh lumbar belt with dual arc zip pockets; adjustable to 54 in.
Weather Protection
Water-resistant zippers and coated fabric shed rain and grit.
GRAYL
filtration systems.
Compact form factor expands from 4.5 L to 6.5 L for adaptive carry
MOLLE & Velcro integration enables rapid loadout changes
Backed by a 10-year manufacturer warranty on workmanship and materials
The numbers, flat and honest.
| Capacity | 4.5 L (274 cu in), expandable to 6.5 L (396 cu in) |
|---|---|
| Weight | 1.4 lb (631 g) |
| Dimensions | 6.75 × 12.5 × 4.75 in (17 × 32 × 12 cm) |
| Waist Belt | Fits 28–54 in (71–137 cm) |
| Material | 500D & 1000D bluesign® approved recycled coated nylon |
| Zippers | YKK Aquaguard® #5 & #8 reverse coil water-resistant |
| Warranty | 10-year workmanship and materials |
| Outer Shell | 500D & 1000D recycled coated nylon (bluesign® approved) |
| Lining | 210D HD recycled coated nylon (bluesign® approved) |
| Pockets | Dual Expanse stretch-woven, concealed zip, and mesh internal pockets |
| Hardware | YKK Aquaguard® #5 & #8 reverse coil zippers |
| Systems | BottleLock®, MOLLE & Velcro expansion panel |
| Origin | Vietnam |
| Care | Hand wash only, drip dry |
WHY YOU’RE BUYING FROM STAY READY.
We aren’t the Amazon of survival. We’re a small, opinionated shop that carries gear we’d stake our own lives on — and we back every piece with real support.
Curated
Every brand we carry has been vetted in the field by our team. If it doesn’t pass our 30-day use test, we don’t stock it.
Authenticated
Factory-direct from authorized dealers. No grey-market, no refurb, no knockoffs. Your warranty is real.
Supported
Real humans on phone, text, and email — seven days a week. We carry this gear ourselves and we stand behind it.
American
HQ in California. Orders ship from our US warehouse. US-based customer care.
PRESS-TO-PURIFY WATER BOTTLES
From a Seattle napkin sketch to the fastest, easiest portable water purifier in the world.
GRAYL started as a napkin sketch in a Seattle bar — an obsession with making the perfect portable water purifier. The first Kickstarter raised over $250,000, and today GRAYL's GeoPress and UltraPress let you press-purify water from streams, hotel sinks, wells, and lakes in seconds. The mission is straightforward: empower adventure with clean, safe water anywhere. A minimum of 1% of every sale goes to environmental charities and non-profits.
- Founded in Seattle, Washington
- Originated from a napkin sketch in a hometown Seattle bar
- Kickstarter campaign raised over $250,000
- GeoPress and UltraPress — press-to-purify in seconds
- 1% of every sale donated to environmental nonprofits
Answers, straight up.
Product-specific questions on the left. Shopping with SRO on the right. Both open-ended — hit us if we missed one.
Can it fit a GRAYL water bottle?
Yes. The Expanse BottleDrop™ Pockets and BottleLock® System are specifically engineered forGRAYLpurifiers and bottles.
How much gear does it hold?
The main compartment offers 4.5 L of storage and expands to 6.5 L with the BottleDrop™ Pockets deployed.
Is it waterproof?
It is water-resistant, constructed from coated nylon and sealed YKK Aquaguard® zippers, but not submersible.
How long does shipping take?
Most orders process within 1–3 business days from our warehouse. From there: 5–7 business days economy, 2–3 business days expedited, or overnight if you need it fast. Free economy shipping on orders over $150 (contiguous US). Alaska, Hawaii, and Pro Eagle / freight items are quoted at checkout. You’ll get a tracking number and link the moment your order ships.
What’s your return policy?
30 days from the day your order arrives. Gear has to come back unused, with all original tags, stickers, and packaging intact. For standard items we’ll send a prepaid return label and deduct return shipping from your refund. Oversized or freight returns are on you, unless the item showed up damaged, defective, or wrong — in which case we cover it.
Refunds hit your original payment method within 10 business days of approval.
What can’t I return?
Final-sale items, gift cards, food and drink products, personal-care items, anything customized or engraved, briefs (hygiene), and hazardous materials. If you’re not sure whether something qualifies, email us before you order — we’ll tell you straight.
Do you ship outside the contiguous US?
Yes. Alaska, Hawaii, and US territories ship on freight-quoted rates calculated after checkout. International orders are available worldwide at variable rates; duties and import fees are the customer’s responsibility. EU customers get a 14-day cancellation window per EU consumer law, on top of our standard return policy.
My package arrived damaged — what now?
Email info@stayreadyoutdoors.com within 7 days of delivery with your order number and clear photos of the damage (product + packaging). We’ll replace, refund, or ship a return label on us — no back-and-forth. Damaged, defective, or wrong-item claims never cost you shipping.
Can I talk to a human before buying?
Yes. Email info@stayreadyoutdoors.com — we answer every message ourselves, usually within a few hours during business days. We carry this gear, we use this gear, and we’d rather talk you out of a kit that doesn’t fit your mission than sell you the wrong one.
Do you offer a military/first-responder discount?
Yes. Active-duty and veteran military, police, fire, EMS, and medical first responders get 10% off every order. Verify through GovX at checkout — one-time, secure, and reusable across thousands of brands. Discount applies automatically once you’re verified.