If you are looking for a synthetic sleeping bag option for fast and light adventures the take a look at the Big Agnes V Notch UL 40 insulated with 70% recycled polyester Primaloft Hi-Loft Ultra Silver Synthetic Insulation. Designed for use in warmer conditions the V Notch UL 40 (Regular) will still give you reliable performance during chilly nights when cheaper bags or quilts will let you down. The Big Agnes V Notch UL is a highly compressible sleeping bag filled with incredibly lightweight and packable Primaloftinsulation. It will keep you warm and keep your pack light, whether that's a backpack, bikepack or packraft. Big Agnes V Notch UL 40 (Primaloft) Long Features: Nylon Rip-Stop Shell Fabric with DWR Finish Polyester Taffeta Lining 70% Recycled Primaloft Hi-Loft Ultra Silver Insulation Highly Compressible Minimalist Hood With Drawcord Full-Length Zipper Ergonomic Foot-Box Construction Packed Dimensions 11cm x 13cm Maximum User Height 198cm Comfort Temperature 6C with Lower Limit 4C Weight Approx 709g Mesh Storage Sack and Nylon Stuff Sack