Although many long johns are meant for extremely cold outside weather, they're also perfect for keeping you comfortable indoors, especially when you're trying to conserve on your heating bill. Long johns are generally full length, form-fitting leggings, and are made of thermal knits that hold your body heat close. They may be textured waffle knits or smooth knits that are made of soft cotton, merino wool, modal or synthetics that wick moisture away from you. Cuddl Duds and Hanro are two of HerRoom's base layer warmers. Hanro makes a particularly efficient long johns knit of super-soft, naturally antibacterial merino wool blended with silk, one of nature's finest fabrics for insulation. If you just want to kick back and relax on a chilly day, HerRoom's long johns are the ticket! Selections vary throughout the year, so check back before cold weather sets in for some great loungewear!