Mayfly OSMO 2P Tent

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The Nemo Mayfly OSMO 2P has a water-resistant rainfly made from 100% recycled polyester/nylon and other premium details. It is not a minimalist ultralight, but its materials and build quality make it a good pick for backpackers.

Nemo says: 

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 repels water 4x longer 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.

Our Verdict

The Nemo Mayfly OSMO 2P is an impressive new offering for backpackers seeking a lightweight yet durable double-wall tent. The standout feature is Nemo’s proprietary OSMO fabric, which is made from 100% recycled polyester/nylon yarns. This composite material repels water 4x longer than standard tent fabrics while stretching 3x less when wet. The OSMO fly is also treated with a PFAS-free DWR coating.

In addition to its highly weather-resistant rainfly, the Mayfly OSMO 2P packs other premium construction details. The rugged 68D PU-coated ripstop polyester floor can handle lots of rough use. Interior space is generous for two, but sadly not big enough to accommodate two wide pads near vertical walls, and a 39″ peak height makes this a roomie livable tent. 

Unique pole geometry and corner anchor hardware allow for taut pitching. Well-designed features like the Divvy Cube stuff sack, which compresses to split tent weight between partners, showcase Nemo’s experience in creating technical camping gear. While not a minimalist ultralight, the Mayfly OSMO’s performance-oriented materials and superb build quality make it an excellent pick for committed backpackers.

– Reviewed by Ultralight Outdoor Gear

Features

• OSMO™ Rainfly – 100% recycled proprietary fabric performs better than comparable tent fabrics and is coated with a PFAS-free DWR.
• Super-Durable Floor – 68D PU ripstop withstands rough treatment on the trail and helps your tent last even more seasons.
• Divvy Cube™ Stuff Sack – Rectangular case fits more efficiently in backpacks and can be compressed when splitting the weight with a partner.
• Axial™ Corner Anchor – Part of NEMO’s Elements™ custom hardware collection, this aluminum piece enables quicker, easier setup and tension adjustment without re-staking.

Specifications

Our Weights

• Flysheet weighs: 396g
• Inner weighs: 610g
• Poles weigh: 323g
• Total weight: 1329g(excludes pegs & bags)
• Pegs x8 weigh: 129

Brand Specs

• Minimum Weight: 3 lb , 0 oz / 1.37 kg
• Sleeping Capacity: 2
• Doors / Vestibules: 2
• Packed Sized: 19.5 x 6.5 in dia / 49 x 16.5 cm dia
• Floor Dimensions: 85 X 43 in / 216 x 109 cm
• Peak Height: 39 in / 99 cm
• Season: 3

Material & Construction

• Frame – 1 hubbed aluminum 9 + 9.5 mm pole / 1 aluminum 9.5 mm pole
• Fly – 100% recycled OSMO™ (1,500 mm)
• Canopy – Polyester taffeta, no-see-um mesh
• Floor – 68D PU polyester ripstop (2,000 mm)

Help & advice:

• The Ultimate Guide to Ultralight Tents
• Time-Saver Guide to Choosing a Tent
• When pegs go bad – Everything you need to know about tent pegs
• Are Tent Footprints Worth It?
• About Nemo
• Nemo Tent Guide
• Nemo Video Resources