This wooden sauna sand timer is excellent for timekeeping while you are enjoying the sauna. It is also suitable for gym, bathroom, yoga, classroom and other timing occasions. Heat-resistant rotating hourglass: featuring heat-resistant glass, this sand clock is designed to withstand the hot and steamy environment of a sauna room.15-minute sand timer: 15 minutes is a popular length of time to enjoy a sauna session. The rotating timer also includes 5 and 10 minute approximation markers for shorter sessions. Durable material: solid pine wood is a beautiful natural material. Pine wood has a straight grain, and the knots give the material its signature, rustic look. Made of pinewood, the sauna hourglass is more durable.