Chalk up fast and more efficiently when on the wall with the Mammut Sender Light Chalk Bag. This ultra-lightweight chalk bag was designed for the 2024 Olympics, with input from Jakob Schubert and Adam Ondra. The wide, reinforced opening allows you to chalk up quickly at all times. The fleeceless interior saves weight and dries faster, making it ideal for deep water soloing. When solid resting positions are few and far between and every millisecond counts, the Sender Light Chalk Bag is the one you can rely on.