Complex sentence: Slated as a tier upgrade for the standard F50 adiZero series, rather than a second edition, the F50 adiZero Primes weigh in at 145g (or 5.1 oz), making them the lightest boots in the market.
Split into simpler sentences: Slated as a tier upgrade for the standard F50 adiZero series rather than a second edition. The F50 adiZero Prime weigh in at 145g (or 5.1 oz), making them the lightest boot in the market.