Updated for 2021, Kayu men’s and women’s ultralight down mummy bags are pinnacle equipment for ultralight adventures. Careful tailoring of the hood, footbox, and body-mapped core creates an optimal fit with no excess weight or wasted space. Premium 800 FP down and aggressive, thermally efficient patterning make for a trusted companion on longer journeys where every ounce matters.

Our flagship Thermo Gills^TM allow you to regulate temperature without letting in drafts, deeply extending the useable temperature range. The waterproof/breathable footbox and hood protect from tent wall condensation. Our exceptionally packable 800 FP down is hydrophobic, PFC-free, and 100% Responsible Down Standard (RDS) certified. Top-shelf fabrics include a 20D nylon ripstop with DWR on the shell, an ultra-smooth 30D nylon taffeta lining, and a 40D nylon ripstop waterproof/breathable footbox.

Features

• Sculpted fit is designed for optimal thermal efficiency and packability.
• Filled with premium 800 FP hydrophobic, PFAS-free, and 100% RDS-certified down. Products certified to the Responsible Down Standard (RDS) contain down or feathers from farms certified to animal welfare requirements.
• Closely articulated hood with internal draft collar and draft tube.
• Opposite-sided zippers allow Kayu men’s and women’s models to be zipped together to create a double sleeping bag.
• Thermo Gill^TM vents extend the temperature range of your sleeping bag on milder nights without letting cold drafts in.
• Waterproof, breathable hood and footbox protect you from tent wall condensation, keeping you warm and dry through the night.
• Top-shelf fabrics include a 20D nylon ripstop with DWR on the shell, an ultra-smooth 30D nylon taffeta lining, and a 40D nylon ripstop waterproof/breathable footbox.
• Protected by the NEMO Lifetime Warranty.

Specs