The Kyan ultralight backpacking mummy features FeatherCore construction, made with premium Primaloft insulation. The result is a revolution in insulation, offering ultra-compressibility without sacrificing warmth. This provides all the benefits of synthetic insulation at the same pack size as 650FP down. Coupled with an aggressive shape and a full suite of features, these bags are the new ultralight go-to.

• The Kyan ultralight backpacking mummy features FeatherCore construction, made with premium Primaloft insulation. The result is a revolution in insulation, offering ultra-compressibility without sacrificing warmth. This provides all the benefits of synthetic insulation at the same pack size as 650FP down. Coupled with an aggressive shape and a full suite of features, these bags are the new ultralight go-to.