Lightweight Fitness Bracelets Suitable for All Sporting Activities. 1 Atm Water Resistant, Waterproof in Up to 10 Metres of Water Making This the Ideal Digital Timepieces for Swimming, Rowing, Sailing, Surfing or Snorkelling. Health-grade Silicon Material Emits Negative Ions (anions), Which Provides Many Health Benefits. Great Giveaway Item for Sports Clubs, Gyms, Leisure Centres, Travel Companies, Schools or Universities. Pantone Colour Matched. Minimum Quantity: 500.