New, Unused, Unopened I've used Montbell's waist warmer as well, but this one is warm enough and works perfectly fine. Perfect for this season, like when it suddenly gets cold in the evening or at night. Merino Wool Waist Warmer MERINO WOOL 100% Wool Black Men's Free Size Workman / workman Waist 76-104cm Height 40cm ◆ Merino wool brings comfort to everyday life A functional material born from nature Amazingly, all the functions are inherent in the material itself. ◆ Moisture absorption and heat generation Absorbs water vapor from the body and converts it into heat. ◆ Insulation Keeps the warmth inside the clothing. ◆ Moisture absorption and release Not only warm, but also reduces stuffiness inside the clothing. ◆ Less itchy Uses especially fine merino wool because it touches the skin directly. ◆ Suppresses odors Reduces the three causes of odor (*Tested on fabric after 10 washes) "Reduction rate: Ammonia 98%, Acetic acid 99%, Isovaleric acid 83%" ◆ Moisture absorption and heat generation Maximum moisture absorption and heat generation temperature After 3 minutes, approximately +3.5℃ heat generation (Graph: This product shows approximately 3.5℃ higher heat generation than comparable products from other companies) *This is a fabric comparison test by a third-party organization and is not a test result in actual use. Innerwear Long sleeves Thermal underwear Belly band Body warmer Body warmer