Workout

Warm-up (600)
2 rounds
200swim/ 50 Kick  

Set (1000)
3 rounds
100 free on 1:30
100 (50 kick/50 free) on 1:45
100 kick on 2:15
...100 easy

Set (1500)
12 x 100 as follows:
3 on 1:30
3 on 1:20
3 on 1:30
3 on 1:15
3  on 1:30

Cool-down (200)
200 EZ