Climbing 'Těžký boty' (Heavy Boots) at Číro is a classic challenge, graded 7+/8- on the Czech scale, which translates to roughly UIAA VIII or French 7b/7b+. Located in the renowned sandstone climbing area of Číro, this route demands both technical precision and endurance. It's known for its sustained nature, often featuring delicate moves on small holds and a potential crux that requires careful footwork and body positioning. Despite its moderate length, 'Těžký boty' provides a thoroughly rewarding experience, testing a climber's strength and mental fortitude. It's a must-do for anyone looking to push their limits on the characteristic Czech sandstone.