A miners dream for a gadgets like this that eventually help them search for a buried treasure. The materials is just a regular sandal that has a pack that straps to your legs and vibrate when you pass a metal underfoot. You can have this gadgets from IwantOneOfThose website for only £39.99
• Metal-detecting sandals.
• More user-friendly than traditional metal detectors.
• Find buried treasure just by walking about.
• Detector pack straps to ankle via elasticated band.
• Pack will vibrate or beep when metal is detected underfoot.
• Requires 1 x 9V battery (not included).
• Suitable for ages 12 years +.
• Available in Small (Men's up to 7, Women's up to 8), Medium (Men's 7.5-9, Women's 8.5-10) or Large (Men's 9.5-12, Women's 10.5-13).