The Mantis 300 is our latest innovation in lightweight sleeping bags, featuring our unique ThermX design. ThermX combines a propriety construction and insulation technology to focus warmth where you need it and increase the warmth-to-weight ratio. This means a smaller, more compressible pack size without compromising on performance when you need it. Durable Polair Eco ripstop fabric reduces weight whilst remaining breathable and water resistant. Thermal Reverb and Thermal Embrace keep warmth in whilst an updated Arrow Foot 2.0 design increases comfort and flexibility at your feet.