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Limited Time: Up to 70% Off Everything — Gear Up for Less





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We provide a secure and reliable Free Returns service for all customers. Items that remain unused and unopened may be returned within 60 days for a full refund.
All return shipping expenses, including customs-related fees, are fully covered by us.
Refund processing will be completed within 4 weeks from the date the return shipment is sent, regardless of whether the package has arrived at our facility. In general, refunds are finalized significantly earlier, ensuring a smooth and dependable experience.
Free standard shipping on orders
We are pleased to offer Free Worldwide Shipping on all orders, delivering to all countries and regions supported by our logistics network.
There are no restrictions on order quantity, parcel size, or shipment weight — every order ships at no cost to you. In addition, all customs duties, import taxes, and government-imposed fees associated with your shipment will be fully covered by us, ensuring you will not incur any extra charges upon delivery.
Please note that delivery times may vary due to local customs procedures and carrier conditions, but your shipping and customs costs will remain completely free under this policy.
The Helium UL Vestibule is built as a lightweight, waterproof extension for the Helium UL Bivy, adding extra storage and weather protection for fast-moving backpackers and minimalist adventurers.
Crafted from 100% nylon 15D ripstop with a silicone coating, this semi-translucent vestibule delivers durable, waterproof performance while keeping weight to a minimum. The barrel attachment system integrates seamlessly with the Helium UL Bivy for a secure, reliable setup. Reflective logos and trims improve low-light visibility, and two included aluminum stakes with stake loops provide stability. Designed for use with a single trekking pole, it offers compact, efficient gear storage and weather protection without added bulk.
Note: Compatible only with the Helium UL Bivy.
Outdoor Research® gear is guaranteed to perform throughout the lifetime of the product.
The Helium UL Vestibule combines 15D ripstop nylon with a silicone coating and a streamlined barrel attachment system to deliver lightweight, waterproof storage and weather protection on solo adventures.
Note: Compatible only with the Helium UL Bivy.
Enjoy free ground economy shipping on orders $125+ USD / $175+ CAD. Please note: Final sale items cannot be returned or exchanged.
| 28 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 38 | 40 | 42 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Waist
Measure around your natural waistline at the smallest circumference.
|
29.5”75 | 31”79 | 32”81 | 33”84 | 34”86 | 35”89 | 36”91 | 37”94 | 39”99 | 41”104 | 43”109 |
| Hips
Measure the circumference at the fullest point of your hips keeping tape parallel to floor.
|
35.5”90 | 37”94 | 38”97 | 39”99 | 40”102 | 41”104 | 42”107 | 43”109 | 44.5”113 | 46”117 | 47.5”121 |
| Inseam/ short
Choose a pair of pants that fits well, and measure the inseam from crotch seam to bottom of the hem.
|
30”76 | 30”76 | 30”76 | 30”76 | 30”76 | 30”76 | 30”76 | 30”76 | 30”76 | 30”76 | 30”76 |
| Inseam/ reg
Choose a pair of pants that fits well, and measure the inseam from crotch seam to bottom of the hem.
|
32”81 | 32”81 | 32”81 | 32”81 | 32”81 | 32”81 | 32”81 | 32”81 | 32”81 | 32”81 | 32”81 |
| Inseam/ tall
Choose a pair of pants that fits well, and measure the inseam from crotch seam to bottom of the hem.
|
34”86 | 34”86 | 34”86 | 34”86 | 34”86 | 34”86 | 34”86 | 34”86 | 34”86 | 34”86 | 34”86 |
*All sizing is based on your body measurement.
We adjust the garment for intended fit and intended use.
Classic fit for comfort and ease of movement.
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