Bivy Sack Reviews

Sleeping Bag Terminology

Impress your friends–and understand any salesperson–by learning all sorts of sleeping bag lingo.

Brushed Inner Lining

Differential Cut

Down

Dry-Loft

Hollofil

Hood

Hook-And-Loop Tab

Lite Loft, MicroLoft, Primaloft, Primaloft 2, Thermolite Extreme

Microfiber

Mummy

Overbag

Pile/fleece

Polarguard

Polarguard Delta

Quallofil

Rectangular Bag

Ripstop

Semirectangular Bag

Synthetic Insulation

Taffeta

Taffeta Inner Lining

Zipper Tube