Hot Chillys La Montaña is our king of the mountain for warmth. The fabric of these men's thermal pants consists of brushed, micro-denier polyester fleece for lighter weight and greater strength and durability.

Specs

Hot Chillys two tone microfiber waistband with plush-back
ME Chamois gusset
Horizontal fly construction
Micro-denier polyester fibers for lighter weight, luxurious drape, breath-ability,  strength and durability
MTF polyester moisture transfer fibers for increased moisture management
UPF 40 protection
Mountain weight, active fit