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Armed with NEMO’s top-performing OSMO™ fabric on the fly, Mayfly OSMO™ is a notably durable backpacking shelter for adventurers ready to hit the trail. A proprietary composite fabric, OSMO is made from 100% recycled polyester and nylon yarns and scores 4x better in water repellency than standard tent fabrics — all while stretching 3x less when wet. OSMO fabrics meet fire retardancy standards without the use of added chemicals and are treated with PFAS-free waterproofing.
Paired with the OSMO fly is a super-durable ripstop tent floor that can withstand the not-so-precious treatment that comes with life on the trail. Mayfly OSMO’s massive doors and generous headspace, however, feel anything but rough — there’s ample room for two to comfortably sit side by side.
Featuring NEMO-exclusive Elements™ hardware, this semi-freestanding tent offers an easy, intuitive setup that’s highlighted by the Axial™ corner anchors, which allow for connection and adjustment in one streamlined piece. A Divvy Cube™ stuff sack completes the package for efficient storing and splitting the weight with a friend.
Key Features :
- bluesign® approved OSMO fly meets strict ecological and chemical requirements and has been produced with a minimum impact on people and the planet.
- High-performance, high-strength OSMO™ poly-nylon ripstop fabric has 4x longer lasting water repellency and 3x less stretch when wet. OSMO fabric is made from 100% recycled yarns that are PFAS-free and meet flame retardancy standards without the use of added chemicals.
- Super-durable 68D PU ripstop floor withstands rough treatment on the trail and helps your tent last even more seasons.
- Massive doors and generous headspace allow for side-by-side seating.
- Divvy Cube™ rectangular stuff sack allows you to split the weight with your partner, but stows more efficiently in your backpack.
- Hubbed, pre-bent aluminum poles with a high-arching main pole to significantly increase volume at the head and foot ends.
- Color-coded webbing and NEMO-exclusive Axial™ corner anchors create a smooth, intuitive setup experience.
- Tapered floorplan saves weight while giving backpackers space where they need it most.
Specifications & Information :
| Specs | ||
| Capacity | 2 Person | 3 Person |
| Season | 3 | 3 |
| Minimum Weight | 3 lb , 0 oz / 1.37 kg | 3 lb , 10 oz / 1.63 kg |
| Packed Weight | 3 lb , 8 oz / 1.6 kg | 4 lb , 1 oz / 1.86 kg |
| Packed Size | 19.5 x 6.5 x 3.0 in / 49 x 16.5 x 7.5 cm | 18.0 x 6.5 x 4.0 in / 46 x 16.5 x 9.5 cm |
| Peak Height | 42 in / 105.41 cm | 42 in / 105.41 cm |
| Floor Area | 27.9 sq ft / 2.6 sq m | 39.7 sq ft / 3.7 sq m |
| Floor Dimensions | 85 x 52/43 in / 215.9 x 130.8/109.22 cm | 88 x 68/62 in / 223.52 x 172.72/157.48 cm |
| Vestibule Area | 7.1 sq ft + 7.1 sq ft / 0.7 sq m + 0.7 sq m | 8.6 sq ft + 8.6 sq ft / 0.8 sq m + 0.8 sq m |
| Freestanding | Semi-Freestanding | Semi-Freestanding |
| Door Quantity | 2 | 2 |
| Vestibule Quantity | 2 | 2 |
| Canopy Fabric | Polyester Taffeta/ No-See-Um Mesh | Polyester Taffeta/ No-See-Um Mesh |
| Fly Fabric | OSMO™ | OSMO™ |
| Floor Fabric | PU Polyester (2000 mm) | PU Polyester (2000 mm) |
| Color | Citron/Mango | Citron/Mango |
| Stuff Sack | Divvy Cube | Divvy Cube |
| Rainfly Fabric | Sil/PU OSMO™ (1500 mm) | Sil/PU OSMO™ (1500 mm) |
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At Ascent Outdoors we’re committed to your satisfaction as a customer. We hope to work with you to find the right outdoor products for your adventures!
Online and In-Store Return/Exchange Policy:
- New and unused items in original packaging with tags still attached may be returned within 365 days to receive a full refund, exchange, or store credit. Exceptions apply: See the Garmin policy below.
- Used items may be exchanged for store credit within 30 days of purchase. Shipping fees apply for online orders. Exclusions to Garmin and rock climbing hard and soft goods. If you’re not sure please email us before purchase.
- For your safety, rock equipment including but not limited to rock climbing hardware, harnesses, slings, and ropes cannot be returned at any time. Helmets and shoes may be returned unworn, with tags and in original packaging.
- Please note we charge both sides shipping fees for returns or exchanges for online orders.
Garmin Return/Exchange Policy:
- Please note that Garmin Devices and Watches must be unopened and in their original packaging with tags attached.
- They may be returned within 90 days to receive a refund, exchange, or store credit
- Once taken out from the box or activated - devices/watches cannot be returned or exchanged.
- For any manufacturing defects with your Garmin Device, we can connect you with Garmin Customer Support to facilitate the warranty process and to help troubleshoot the issue.
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