Mayfly OSMO 3P Tent

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The Nemo Mayfly OSMO 3P tent uses Nemo’s proprietary OSMO fabric, which is made from recycled materials and offers excellent water repellency and durability. The tent has a generous interior space and a sturdy construction with a 68D PU-coated ripstop polyester floor.

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 3P tent is an excellent new offering for backpackers seeking a spacious, durable shelter. The design is dominated by Nemo’s proprietary OSMO fabric, which is made from 100% recycled polyester/nylon yarns. This advanced composite material repels water 4x longer than standard tent fabrics while stretching 3x less when wet. The OSMO fly also receives a PFAS-free DWR treatment.

While the OSMO fly excels at shedding moisture, the rest of the Mayfly 3P’s construction is equally robust for rugged adventures. The 68D PU-coated ripstop polyester floor can withstand plenty of trail abuse. Inside, the tent provides a generous 88″ x 62″ floor with a 43″ peak height, fitting three plus gear, though I would use this as a 2-person tent for extended trips.

 Unique pole geometry with Axial corner anchors allows for a taut pitch. Well-designed features like the rectangular Divvy Cube stuff sack make splitting the 3lb 10oz trail weight easy between hiking partners. The Mayfly OSMO 3P blends weather protection with durable, space-efficient construction for a performance-oriented and relatively lightweight three-person backpacking tent.

– 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: 475g
• Inner weighs: 743g
• Poles weigh: 370g
• Total weight: 1588g(excludes pegs & bags)
• Pegs x 8 weigh: 129

Brand Specs

• Minimum Weight: 3 lb , 10 oz / 1.63 kg
• Sleeping Capacity: 3
• Doors / Vestibules: 2
• Packed Sized: 18.0 x 6.5 in dia / 46 x 16.5 cm dia
• Floor Dimensions: 88 X 62 in / 223 x 157 cm
• Peak Height: 43 in / 109 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?
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• About Nemo
• Nemo Tent Guide
• Nemo Video Resources