High Altitude Science is privileged to carry the highest performing weather balloons currently available on the near-space market. Although they are more expensive than the Chinese and Indian balloons that dominate the market, they will significantly outperform these lower grade balloons. Our 600 g balloons consistently reach altitudes of over 30 km ~ 100,000 ft and our 1200 g balloons consistently reach altitudes of over 35 km ~ 115,000 ft!