Workout

Warm-up (600)
400 swim
100 kick

Set (1000)
4 x 100 free on 1:30
6 x 50 on :50 
…descend 1-3, 4-6 
2 x 100 free on 1:45
…15m sprint/then easy  
100 free EZ

Set (1500)
6 rounds
100 moderate kick on 2:30
...odd rounds 
50 sprint! free
100 drill on 3:00
..even rounds
100 sprint free
50 drill on 3:00

Cool-down (100)
100 EZ swim