Twenty minutes of nothing is everything. The 918-631 Sauna Hourglass Timer lets you disconnect, sit back, and let the red sand do the only counting that matters. Crafted from heat-treated beech wood with heat-resistant tempered glass, this wall-mounted timer is built for soft saunas and infrared saunas alike—marking intervals at 5, 10, 15, and 20 minutes so you always know where you are in your session without reaching for a phone. No batteries. No buttons. No fret—just sweat.