Quick Answer
Choose the Zenbivy Zip Sack for dry, organized storage of small gear, or the UL Inflation Sack if you want a lightweight way to inflate your Zenbivy mattress while keeping it dry.
Different Jobs, Different Design
The Zip Sack and UL Inflation Sack look similar at a glance, but they solve different problems. The Zip Sack is a fully welded, water-resistant zippered pouch built for organizing and protecting small items inside your pack. The UL Inflation Sack is a compact storage bag that doubles as a manual inflation tool for Zenbivy Flex™ Air and Ultralight Mattresses.
That dual purpose changes how you pack. If you carry a compatible Zenbivy mattress, the UL Inflation Sack replaces a separate pump and keeps the mattress dry. If your priority is keeping electronics, first-aid supplies, or spare socks organized and dry, the Zip Sack is the more straightforward choice.
Weight and Portability Trade-Off
At just 1 ounce, the UL Inflation Sack is extremely light and takes up minimal pack space. The Zip Sack, while not heavy, is designed primarily for storage and organization, so it may not be the lightest option if you're counting every gram.
If you already own a Zenbivy mattress that includes a UL Inflation Sack, you may not need to buy one separately. The Zip Sack then becomes a useful add-on for dry organization without duplicating gear you already have.
Trade-Offs at a Glance
- Organization vs. Dual Function: Choose the Zip Sack if your main need is dry, organized storage for small items. Choose the UL Inflation Sack if you also want a manual inflation tool for a compatible Zenbivy mattress.
- Weight vs. Versatility: The UL Inflation Sack's 1-ounce weight makes it a minimalist choice, but it only serves its inflation purpose with Zenbivy Flex™ Air or Ultralight Mattresses. The Zip Sack works with any gear you need to keep dry. Check whether your Zenbivy mattress already includes a UL Inflation Sack before buying a spare.
- Price and Value: The Zip Sack is priced at USD 11.88 (compare at USD 18.00), while the UL Inflation Sack is USD 18.63 (compare at USD 27.00). If you only need dry storage, the Zip Sack offers a lower-cost solution. Consider your budget and whether the inflation function justifies the higher price.
Product Facts
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Zip Sack: The Zenbivy Zip Sack is a fully welded and water-resistant zippered storage pouch for backcountry organization. It keeps small items like electronics or first-aid supplies dry and easy to find inside your pack.
Zip Sack
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UL Inflation Sack: Weighing just 1 ounce, the UL Inflation Sack is a compact storage bag that keeps your mattress dry and doubles as a manual way to inflate your Zenbivy Flex™ Air or Ultralight Mattress. It eliminates the need for mouth-blowing and saves weight by combining storage and inflation in one item.
UL Inflation Sack
Which Should You Choose?
Best for
- Backpackers who want to keep small items dry and organized without extra weight
- Zenbivy mattress owners who want a lightweight inflation alternative to mouth-blowing
Not for
- Campers who need a large-capacity dry sack for bulky gear like sleeping bags or clothing
- Those who prefer electric or pump inflation and don't need manual inflation